Approved - knives withdrawn from private collections, checked, overhauled and certified by Coltelleria Collini
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Citadel - Camp 565 - Water Buffalo Horn - PRIVATE COLLECTION - handcrafted knife
PREVIOUSLY PURCHASED KNIFE, FROM A PRIVATE COLLECTION
* Provenance: 2008 knife acquired from a private seller, previously purchased
* Condition: Overall in excellent mechanical condition and good cosmetic condition; has a few small spots of oxidation on the carbon steel blade and some minor signs of wear on the guard and handle
* Commercially available: Discontinued
* Sharpening: Professionally resharpened
* Marks on blade: Small spots of oxidation
* Marks on the handle: A few minor signs of wear on the guard and handle
* Box: Sold in a nylon pouch with a zipper and embroidered manufacturer’s logos
* Sheath: Included and in excellent condition
* Manuals, Certificates, and Warranties: Warranty certificate with technical specifications and date of manufacture
* Inspected and certified by our in-house laboratory
Intended use: Collectible/sportingProduction type: Handcrafted
Country of origin: Cambodia
Blade: DNH7 carbon steel, selectively hardened to 40/60 HRC
Blade finish: Polished, with brut de forge sections
Handle: Buffalo horn
Blade length: approximately 135 mm.
Blade thickness: approximately 5.5 mm.
Overall length: approximately 247 mm.
Weight: approximately 178 g.
Lock: set back 1.5 cm
Sheath: leather
Notes: Previously purchased knife, from a private collectionCI-CB565-CP -
ExtremaRatio - R.E.S. - Rescue Emergency Survival Knife - PRIVATE COLLECTION - knife
PREVIOUSLY PURCHASED KNIFE, FROM A PRIVATE COLLECTION
* Origin: Acquired from a private individual, previously purchased
* Condition: In excellent mechanical condition and in acceptable cosmetic condition, which does not limit its practical use
* Commercially available: Discontinued
* Sharpness: Factory-sharpened
* Marks on blade: Various cosmetic marks from use and aging
* Marks on handle: Various cosmetic marks from use and aging
* Box: -
* Sheath: -
* Manuals, Certificates, and Warranties: -
* Inspected and certified by our in-house laboratoryIntended use: Multipurpose emergency and survival knife
Type of production: Industrial
Country of manufacture: Italy
Blade: N690Co stainless steel
Finish: Burnished
Handle: Anodized Anticorodal aluminum alloy
Blade length: 85 mm.
Blade thickness: 2.5 mm.
Overall length: 210 mm.
Weight: 212 g.
Locking system: Liner Lock on the blade and wood saw; push-button lock on the cable cutter / belt cutter
Packaging: Cardboard box with Extrema Ratio logos and manufacturer’s certificates
Notes: Quick-release emergency cable/belt cutter blade - stainless steel glass breaker - wood saw - 2013 model, now discontinued - previously purchased knife from a private collectionER-RES-CP -
ExtremaRatio - 185° RAO knife - PRIVATE COLLECTION - Knife
PREVIOUSLY PURCHASED KNIFE, PRIVATE COLLECTION
* Origin: acquired from private owner - SERIAL CK0191S - produced in 2021
* Condition: overall very good condition (see photos)
* Market availability: no longer in production in this unit-marked version
* Sharpening: factory edge
* Blade marks: none
* Handle marks: none
* Box: present, slightly damaged
* Sheath: included
* Manuals, certificates and warranty: included
* Checked and certified by our internal laboratory
Folding knife made according to specifications requested by the Italian Army unit 185th RAO (Regiment for Target Acquisition) and currently in service with the same unit. The service version differs from the civilian one only by the complete absence of writings or logos on the blade.
HISTORICAL NOTES ON THE UNIT:
The 185th RAO of the "Folgore" is a unit with ancient traditions, yet relatively new in its current form. It was established on 3 April 2000 following the reorganization of the 185th Paratroopers Artillery Regiment. Based in Livorno, it is an atypical artillery unit currently included within the Special Forces framework.
Composed entirely of volunteer personnel, the 185th RAO selects its members through physical tests and a qualification course structured in modules of increasing difficulty. The tasks assigned to RAO operators are numerous and highly sensitive: they involve gathering information on enemy targets and relaying it to command. More generally, this can be described as reconnaissance in sensitive areas.
"It is therefore clear," the Army emphasizes, "that the activity of the acquisition operator takes place mainly in hostile territory, in small self-sufficient teams operating in isolation."
RAO paratroopers are specialists in infiltration and exfiltration techniques and are able to operate in the field for up to 8–10 days without external resupply. They know how to avoid capture, escape and evade from enemy-controlled areas and, above all, how to identify, define and assess strategically relevant targets. Since 2002, the year of its reorganization, detachments of the 185th Regiment have operated in all major operational theaters: from the Balkans to Afghanistan and Iraq. In these areas they mainly carry out medium- and long-range reconnaissance and surveillance activities within the area of responsibility of the Italian contingent.
Intended use: military/tactical
Type of production: industrial
Blade production: Italy
Blade: N690Co stainless steel 58/60HRC
Blade treatment: MIL-C 13924 black coating
Handle: anodized anticorodal aluminum 4.5mm
Blade length: 118mm
Blade thickness: 6.3mm
Closed length: 142mm
Total length: 261mm
Weight: 335g
Lock: modified front lock with additional threaded safety pin
Clip: none
Sheath: tactical nylon MOLLE-compatible, suitable for both closed and open knife use
Notes: diamond pocket sharpener includedER-RAO-BK-CP -
ExtremaRatio - BF2CT - Stone Washed N690Co - USED - PRIVATE COLLECTION - knife
KNIFE PREVIOUSLY PURCHASED AND USED, FROM A PRIVATE COLLECTION
* Origin: Purchased from a private individual, previously owned and used
* Condition: Excellent mechanical condition, good cosmetic condition (a few small marks on the aluminum handle and a few small spots of oxidation on the blade)
* Commercially available: Available on the market
* Sharpening: Professionally resharpened
* Marks on blade: Small spots of oxidation and minimal polishing of the blade’s finish due to use
* Marks on the handle: 2–3 small scuffs on the aluminum handle
* Box: Included
* Sheath: -
* Manuals, Certificates, and Warranties: Included
* Inspected and certified by our in-house laboratoryThe BF2 is a “full-size” folding knife particularly suited for professional use by military and law enforcement personnel in the field. The handle is sturdy and comfortable; the reversible, wraparound clip serves as a useful and comfortable thumb rest in the “reverse grip” position. The handle scale is solid with the characteristic recessed surfaces designed to engage the opening pins without them protruding from the knife’s closed profile. The blade, available in either a drop-point or tanto configuration, features a flat grind and, like the BF1, a particularly thick and durable tip. The blade locking mechanism is the proven LINER-LOCK, supplemented by a manually operated safety mechanism protected by a guard.
Intended Use: Tactical/Military
Production Type: Industrial
Blade: N690Co stainless steel, 58 HRC
Country of Manufacture: Italy
Handle: Anticorodal
Blade Length: 90 mm.
Blade thickness: 3 mm.
Closed length: 124 mm.
Overall length: 210 mm.
Weight: 142 g.
Closure: Liner Lock with additional safety lock operable when the knife is open
Clip: Reversible and removable stainless steel clip
Notes: Previously owned and used knife, from a private collectionER-BF2CT-SW-CP -
ExtremaRatio - Pugio SE Desert Warfare - Single-Edge Version - PRIVATE COLLECTION - knife
KNIFE WITHDRAWN FROM PRIVATE COLLECTION
* Origin: Withdrawn from a private collection, previously purchased.
* Condition: Like new, never used
* Commercially available: Discontinued
* Sharpening: Factory sharpened
* Marks on blade: None
* Marks on handle: None
* Box: Present and complete
* Scabbard: Present
* Manuals, Certificates and Warranties: Present
* Checked and Certified by our in-house laboratory
PUGIO: The name evokes the historic Roman dagger, but the handle, with its tapered cuttlebone-like shape, also recalls the elegance of Caucasian daggers.Compact and sharp, this boot dagger is designed as a backup weapon, ideal for defense and perfect for those seeking discretion and portability. The blade, sharpened only on one side, ensures lethal accuracy, while the absence of guards prevents any risk of entanglement in close, high-intensity combat. The rigid scabbard with automatic engagement system and Tek-Lok type attachment allows for unique versatility: it can be positioned horizontally, vertically or tilted at a 45-degree angle, easily adapting to any requirement.
Intended Use: Tactical / CQCProduction type: Industrial
Country of production: Italy
Blade: stainless steel N690Co 58HRC
Blade treatment: Desert Warfare
Handle: Forprene
Blade length: 110mm.
Blade thickness: 6.5mm.
Total length: 225mm.
Weight: 190g.
Sheath: made of ABS, rigid, with Tek-Lok type attachment
Packaging: cardboard box with Extrema Ratio logos
Notes: Single edge versionER-PUGIODW-CP -
ExtremaRatio - RAO C Folding Knife - Tactical Grey - PRIVATE COLLECTION - knife
PREVIOUSLY PURCHASED KNIFE, FROM A PRIVATE COLLECTION
* Origin: Acquired from a private seller, previously purchased
* Condition: Overall in excellent condition; opened and closed only a handful of times; never used for cutting
* Available on the market: Available
* Sharpening: Factory-sharpened
* Marks on blade: None
* Marks on handle: Minor marks on the handle’s anodized finish, near the release pins
* Box: Present and complete
* Sheath: /
* Manuals, Certificates, and Warranties: Present
* Inspected and Certified by our in-house laboratoryThe Extrema Ratio RAO C is a compact folding knife derived from the iconic RAO II.
Thanks to its design, the RAO C is a tool that, despite its small size, manages to guarantee the same robustness and reliability as its larger counterpart while offering improved portability and handling.
The handle consists of two finely crafted anodized aluminum scales, to which Extrema Ratio applies a hard-anodizing treatment, making the handle more resistant to wear and corrosion.
Two steel frames help increase the handle’s sturdiness to withstand the most demanding uses.
The opening lock mechanism is particularly durable, as it is supplemented by a safety system that transforms it into a true fixed blade. The primary safety on the blade is activated by lifting and lowering the locking pin. To ensure maximum safety for the user, a practical and quick secondary safety has been added, which can be activated simply by moving the locking pin horizontally.
The reversible clip is designed to allow for concealed carry in a pocket, making the knife invisible from the outside.
The blade is made of Böhler N690 steel, hardened to 58 HRC, with the classic Extrema Ratio MIL-C-13924 black finish.
To lighten the steel frames, a laser-cut template based on the RAO C profile was created, which was then used to make a gadget included with the knife.
Intended use: Hiking / Tactical
Production type: industrial
Country of manufacture: Italy
Blade: N690Co stainless steel 58HRC
Blade finish: MIL-C-13924 burnishing
Handle: hard-anodized anticorodal
Blade length: 100mm.
Blade thickness: 4mm.
Closed length: 132mm.
Overall length: 225mm.
Weight: 239g.
Closure: Modified front lock, with additional push-button safety
Notes: Keychain gadget, featuring a miniature profile of the knife—a previously purchased knife from a private collectionER-RAOC-TG-CP -
ExtremaRatio - M1A1 Last Call - PRIVATE COLLECTION - multi-purpose rescue knife
KNIFE WITHDRAWN FROM PRIVATE COLLECTION
* Type: Previously purchased
* Condition: Like new, never used and never removed from its packaging
* Available on the market Limited edition of 130 pieces
* Sharpening: Factory sharpened
* Marks on blade: No
* Marks on handle: No
* Box: Present
* Sheath: /
* Manuals, Certificates, and Warranties: Present
* Checked and certified by our in-house laboratoryThe M1A1 model is Extrema Ratio's personal interpretation, created to pay homage to the historic folding knife used by the Italian Army.
During World War II, the original knife was part of the British Army's equipment. At the end of the war, thanks to the “Marshall Plan” for European recovery, the Italian Army received some of the weapons and equipment supplied to the Allies during the war, including this multifunctional tool. It was later reproduced in Italy in three modified versions.
Extrema Ratio, to bid farewell to this historic and renowned knife, presents a final exclusive version, limited to only 130 pieces.
Like its predecessor, the M1A1 LAST CALL is equipped with a can opener, bottle opener, screwdriver, and knot-tying peg. The reversible clip is designed for maximum concealability.
The drop blade, like all the other tools listed above, features Geotech Camo customization, Extrema Ratio's innovative and original camouflage pattern, created using laser engraving.
The locking mechanism used is the tried and tested LINER LOCK. The handle consists of two anticorodal aluminum scales anodized in the brand new Tactical Mud color.
Type of production: industrial
Blade: N690Co 58HRC stainless steel with Geotech Camo finish
Country of production: Italy
Handle: Anticorodal in Tactical Mud color
Blade length: 70mm.
Blade thickness: 3mm.
Closed length: 99mm.
Total length: 168mm.
Weight: 124g.
Closure: Liner Lock
Clip: reversible and removable stainless steel
Notes: Screwdriver, can opener, bottle opener, knot untangler - serial number 81ER-BFM1A1LC-CP -
ExtremaRatio - T3000 S Testudo - First Series - PRIVATE COLLECTION - Knife
KNIFE WITHDRAWN FROM PRIVATE COLLECTION
* Origin: Withdrawn from a private collection, previously purchased
* Condition: Like new, never used and never removed from its original packaging
* Available on the market: Out of production
* Sharpness: Factory sharp
* Marks on blade: None
* Marks on handle: None
* Box: Present
* Sheath: Present
* Manuals, Certificates, and Warranties: Present
* Checked and Certified by our in-house laboratoryIntended use: Tactical/Sport
Type of production: Industrial
Country of production: Italy
Blade: N690Co stainless steel
Finish: Testudo burnishing
Handle: Forprene
Blade length: 128mm.
Blade thickness: 6.3mm.
Total length: 258mm.
Balance: rearward
Weight: 253g.
Sheath: Gen.1, ABS, with Tek-Lok multi-position attachment
Packaging: cardboard box with Extrema Ratio logos
Notes: from a private collection - 2007 model now out of production (replaced by the T4000 series)ER-T3000S-CP -
Extremaratio - Fulcrum II D Folder Knife - PRIVATE COLLECTION - knife
KNIFE WITHDRAWN FROM PRIVATE COLLECTION
* Type: previously purchased
* Condition: in perfect mechanical condition, aesthetically shows some abrasion and signs of wear due to the passage of time
* Available on the market: iconic model from the early 2000s, now out of production
* Sharpness: Factory sharpness, could be improved
* Marks on blade: some minor abrasions due to age
* Marks on handle: cosmetic abrasions due to age
* Box: -
* Manuals, certificates, and warranties: -
* Checked and certified by our in-house laboratoryDirectly derived from military specifications, this folding knife is designed to replace a fixed blade in the most demanding operational situations. To ensure maximum reliability, extremely robust materials, increased thicknesses, and a solid and secure back lock opening/closing system have been used.
A manual safety lock ensures maximum protection during use, drastically reducing the risk of accidental closure. When inserted in the closed position, it also prevents the knife from being immediately used against the operator in the event of theft.
Materials and workmanship
All components are machined from solid blocks using high-precision CNC machines, while assembly, adjustment, and sharpening are carried out by hand. The blade is made of N690 cobalt stainless steel, known for its high mechanical strength, great cutting ability, edge retention, and excellent corrosion resistance. It has a flat grind and a hardness of 58 HRC.The scales are made of Anticorodal, an aluminum alloy that is highly resistant to stress and oxidation. The tang, made of hardened N690, acts as an effective emergency glass breaker. Screws, pins, and clips are made of burnished stainless steel, while the blade, lever, and tang are protected by Testudo treatment, which is highly resistant to abrasion and oxidation. The scales are black anodized.
Intended use: tactical/militaryBlade: N690Co 58HRC stainless steel with burnished “testudo” finish
Country of manufacture: Italy
Blade length: 95mm.
Blade thickness: 6.3mm.
Closed length: 127mm.
Total length: 220mm.
Handle: Anticorodal, 4.5mm thick
Weight: 200g.
Closure: Back Lock with additional safety system, also functioning when the blade is closed
Clip: removable and reversible, stainless steel
Sheath: -
Notes: previously purchased knife from a private collectionERF2D-CP -
ExtremaRatio - BF1CD Serrated Knife - PRIVATE COLLECTION - Drop Black - Knife
KNIFE WITHDRAWN FROM PRIVATE COLLECTION
* Origin: Acquired from a private collector, previously purchased
* Condition: Excellent, minor marks on the blade
* Commercial availability: Yes, smooth blade version only
* Box: Included
* Sheath: -
* Manuals, Certificates and Warranty: Included
* Inspected and certified by our in-house laboratoryThe BF1 CD Drop Black by ExtremaRatio is a tactical folding knife designed for users who demand serious performance in a compact format. Its essential and functional design, combined with premium materials such as Böhler N690 steel and anodized aluminum, ensures durability, ease of handling, and reliability even in extreme conditions.
Ideal for EDC (Every Day Carry), military, or professional use, this model merges discreet elegance with operational robustness. The serrated blade version, not standard in the series, offers added versatility for tough cutting tasks without compromising structural integrity.
Intended use: tactical use / EDC (Every Day Carry)
Production type: high-end industrial production / specialized cutlery
Country of manufacture: Italy
Blade: Böhler N690
Blade finish: burnished (mil‑c‑13924 burnishing)
Handle: anticorodal anodized aluminum
Blade length: 69 mm
Blade thickness: 3 mm
Closed length: 107 mm
Total length: 171 mm
Closed thickness: ~12 mm
Weight: 88 g
Locking mechanism: Liner Lock
Clip: reversible tip-up clip, “wrap-around” on tang
Packaging: ExtremaRatio original box (rigid cardboard with logo)ER-BF1CDS-AP -
ExtremaRatio - 39-09 Operativo Knife - PRIVATE COLLECTION - Knife
KNIFE WITHDRAWN FROM PRIVATE COLLECTION
* Origin: Acquired from a private owner, previously purchased and used
* Condition: Overall good, with marks and scratches on the blade and guard. The sheath shows signs of wear.
* Commercial availability: Discontinued
* Edge: Original
* Box: Included
* Sheath: Included
* Manuals, Certificates, and Warranties: Included
* Inspected and Certified by our internal laboratoryThe ExtremaRatio 39‑09 Operativo is a tactical collector's knife that combines the prestigious Italian military tradition with the precision of modern engineering. Inspired by the silhouette of the 1939 "paratrooper assault dagger", this model is built with premium materials and military-grade finishes that meet operational standards.
Its matte black coating, absence of flashy logos, and overall sturdiness make it ideal for discerning collectors, tactical blade enthusiasts, and those who value operational tools with strong symbolic meaning.
Every detail, from the Böhler N690 steel blade to the Forprene handle, is designed to ensure a balance of aesthetics, functionality, and reliability.
Intended use: collection / display / symbolic tactical use
Production type: high-end industrial manufacturing
Country of production: Italy
Blade: Böhler N690 steel, hardened (~ 58 HRC)
Blade finish: black oxide coating (MIL‑C‑13924 burnishing, non-reflective)
Handle: black Forprene
Blade length: 195 mm
Blade thickness: 6.3 mm
Total length: 319 mm
Weight: 338 g
Locking mechanism: fixed blade (not a folding knife)
Packaging: standard manufacturer box / rigid thigh sheath / nylon leg sheathER-3908-AP -
ExtremaRatio - Col Moschin Compact in San Mai V-TOKU2 - Limited Edition - PRIVATE COLLECTION - Knife
KNIFE FROM A PRIVATE COLLECTION
* Origin: Retrieved from a private collection, previously purchased
* Condition: Like new
* Available on the market: Discontinued
* Sharpening: Original
* Blade marks: None
* Handle marks: None
* Box: Included
* Sheath: Included
* Manuals, Certificates and Warranty: Included
* Inspected and Certified by our in-house labJapanese steel meets Italian excellence
For this 2020 collaboration, exclusively for Coltelleria Collini, we decided to offer a series of best sellers produced by Extrema Ratio. These knives are made using the renowned San Mai steel produced by Japan’s Takefu Steel. Specifically, we used carbon-rich V-Toku2 at 62/63HRC for the central core and stainless SUS410 for the outer layers, resulting in superior cutting performance, penetration, edge retention, ease of sharpening, and at the same time excellent corrosion resistance and increased resilience due to the laminated structure.
Model Col Moschin Compact: this First Production Run was limited to 15 numbered units, from 1 to 15.
The lethal efficiency of the COL MOSCHIN knife, now in compact version. Comes with a rigid belt sheath and BELT-CLIP. The sheath can be mounted horizontally, vertically, or at a 45° angle.
Usage: tactical, sports, hiking, collecting
Blade: full tang, laminated Japanese steel (San Mai) with cutting edge in V-Toku2 (carbon steel) at 62/63HRC and outer cheeks in SUS410 (stainless)
Handle: Forprene
Blade length: 110mm
Blade thickness: 6.5mm
Overall length: 212mm
Balance: 0.5cm behind the guard
Weight: 209g
Sheath: ABS with multi-position Tek-Lok attachment
Notes: Numbered edition - cardboard box with Extrema Ratio logos and certificate - as the cutting edge is carbon steel, it is recommended to lightly oil the blade to maintain its condition.As in ancient Japanese Samurai swords.
The laminated steel – imported into Italy by Collini Steel directly from Japan’s Takefu Steel – is based on the age-old Japanese sword-making tradition. As early as the 1100s, Japanese blacksmiths were combining different metals to craft Katana swords with extraordinary cutting power, resistance, and flexibility. This revolutionary technique allowed Samurai swords to survive through centuries and become among the most fascinating human-made artifacts. Applied to modern metallurgy, this tradition now yields advanced steels already used in knife-making by brands like Fallkniven, Cold Steel, Mcusta, Kai, Sog, Zwilling, Rockstead, etc.
San Mai Steel Features: A combination of different metals bonded together to create a composite with amplified properties:
- Greater edge retention
Thanks to high-carbon premium steels (VG10, CoS, Shiro) or powder steels (SPG2) in the core, once hardened, the blade achieves cutting performance far superior to traditional steels.
- Higher resilience
Based on Japanese sword construction, the multi-layer steel is highly resistant to breaking due to the toughness of the core and flexibility of the stainless cladding.
- Improved corrosion resistance
The outer stainless layers ensure high corrosion resistance. Takefu’s multi-metal bonding also enhances galvanic protection of the edge.
- Easy processing post heat-treatment
Despite being hardened, the outer layers retain softness, allowing easy drilling, grinding, or welding. Cryogenic treatment is recommended for optimal performance.
- Enhanced aesthetics
Multi-layer or Damascus-patterned knives are elegant, refined, and highly valued by collectors worldwide.For more information: collinisteel
Includes cover and article published in the October/November 2016 issue of "Coltelli" magazine.
ER-COLC-SM -
Lone Wolf Knives by Benchmade - Mountainside Skinner - PRIVATE COLLECTION - 40030 - hunting knife
KNIFE WITHDRAWN FROM PRIVATE COLLECTION
* Provenance: collected from a private individual, previously purchased
* Condition: Like new, never used
* Available on the market: discontinued
* Sharpening: factory
* Signs on blade: none
* Signs on handle: none
* Box: -
* Sheath: equal to the new
* Manuals, Certificates and Guarantees: -
* Controlled and Certified by our in-house laboratory
The Benchmade Lone Wolf Mountainside Skinner takes the classic skinning knife to the next level. Designed with a traditional line and a handle angle designed to maximize ergonomics, it offers surprising comfort even during prolonged use. The blade pin features wide knurls (jimping) that ensure safe grip control, while the generous finger choil allows for a stable and precise hand position during the most delicate work phases.Born from the Lone Wolf philosophy, this knife reflects a deep dedication to the outdoors: combining the contributions of professional hunters, modern technology, and a timeless traditional style, the result is a reliable and high-performance tool, designed to accompany you when it really matters. This is your knife.
Intended use: Sporty / CollectionType of production: industrial
Country of production: USA
Blade: Full tang in N680 stainless steel with stonewashed finish
Handle: Wood
Blade length: 6.4mm.
Blade thickness: 3.1mm.
Total length: 177mm.
Balance: Backward
Weight: 148g.
Sheath: leather
Note: Design by Lone Wolf Knives, Manufactured by Benchmade - Previously purchased knife, from a private collectionBM-40030-100-CP -
ExtremaRatio - Ontos - Black N690Co & Forprene - USED / PRIVATE COLLECTION - knife
KNIFE WITHDRAWN FROM PRIVATE COLLECTION
* Origin: Withdrawn from a private collection, previously purchased and used
* Condition: Overall in good condition, with superficial cosmetic marks on the blade due to actual use, which in no way compromise its functionality and use
* Available on the market: On the market
* Sharpening: Resharpened
* Marks on blade: Several superficial cosmetic marks on the burnishing
* Marks on handle: None
* Box: Present and complete
* Sheath: Present and in excellent condition
* Manuals, certificates, and warranties: Present
* Checked and certified by our in-house laboratory
Born from the growing demand of demanding professionals, Extrema Ratio presents ONTOS—a field knife designed to tackle any challenge. The name, derived from the Greek word for “the thing,” represents the perfect synthesis of strength, versatility, and reliability. Compact but extremely durable, ONTOS is the ideal companion in any situation, thanks to its partially serrated blade that always guarantees a sharp, ready-to-use cut.Its nylon thigh sheath, equipped with the MOLLE system, is designed to remain firmly anchored even in the most difficult conditions, when the soldier is forced to give up his primary tactical equipment. And for those looking for an extra level of preparedness, a survival kit is available, sold separately, to be attached directly to the knife sheath.
Intended use: Heavy UtilityType of production: Industrial
Country of production: Italy
Blade: N690Co 58HRC stainless steel
Surface treatment: MIL-C-13924 burnishing
Handle: Forprene
Blade length: 168mm.
Blade thickness: 6.3mm.
Total length: 299 mm.
Balance: advanced
Weight: 411 g.
Sheath: nylon thigh sheath, modular, compatible with M.O.L.L.E. systems.
Packaging: Cardboard box with Extrema Ratio logos
Notes: knife previously purchased and used, from a private collectionER-ONB-CP -
ExtremaRatio - Sethlans Survival Knife - D2 Exp Dark - USED / PRIVATE COLLECTION - Knife
KNIFE WITHDRAWN FROM PRIVATE COLLECTION
* Origin: Withdrawn from a private collection, previously purchased and used
* Condition: Overall in excellent condition, with slight superficial signs of wear from use that do not compromise its functionality in any way. The sharpening stone and steel included have also been used, with minimal signs of cosmetic abrasion.
* Available on the market: Available on the market
* Sharpening: Factory sharpened, with minor “field” sharpening with the included ceramic stone
* Marks on blade: Minor surface wear from use
* Marks on handle: None
* Box: Present
* Sheath: Present
* Manuals, Certificates, and Warranties: Present
* Checked and certified by our in-house laboratoryThe “Extrema Ratio Sethlans” is a fixed blade utility knife designed to handle a wide range of situations, suitable for survival, bushcraft, prepping, but also as a backup blade. The Sethlans is available in two versions with two different types of steel.
The Black version uses D2 steel, heat and cryogenically treated to 60 HRC, which has a high regrindability even with makeshift tools. To give greater hardness and resistance, the blade is coated with the new Teflon-based product “EXP DARK” offered by Extrema Ratio.
The knife comes with G10 scales featuring the ergonomic design characteristic of Extrema Ratio handles. They can be removed to reveal the skeletonized structure of the knife, which allows for maximum lightness with minimum thickness. For lovers of extreme customization, the full-tang structure allows the handle to be coated with paracord.
The sheath is made of a lightweight, minimalist Kydex. It can be disassembled and adapted for both left- and right-handed users. The addition of an optional belt clip allows the knife to be positioned either vertically or horizontally and makes the sheath much more versatile than the textile version. It also comes with a mini pouch with a M.O.L.L.E. system containing a double-sided sharpening stone and a firesteel for lighting fires.
Intended use: Survival, bushcraft, prepping
Type: Fixed blade
Blade length: 107mm
Total length: 224mm
Blade thickness: 6.3mm
Sharpening: Flat edge
Weight: 207g
Blade material: D2 steel (60HRC)
Blade finish: EXP DARK
Handle: G10
Notes: designed in collaboration with Daniele Dal Canto, Master Advanced F.I.S.S.S. instructor (Italian Federation of Survival Sports and Experiments).ER-SET-BK-CP -
ExtremaRatio - Satre - S600 Black EXP Dark - PRIVATE COLLECTION - Neck Knife - Knife
KNIFE WITHDRAWN FROM PRIVATE COLLECTION
* Origin: Collected from a private individual, previously purchased and used.
* Condition: Overall in very good condition with a few minor cosmetic signs of use that do not affect its functionality
* Commercially available: Commercially available.
* Sharpening: Factory.
* Marks on blade: Small aesthetic marks from use.
* Marks on handle: A couple of small cosmetic marks.
* Box: Present
* Scabbard: Present
* Manuals, Certificates and Warranties: Present
* Checked and Certified by our in-house laboratory
Satre is a small, lightweight and extremely durable fixed-blade knife. Given its characteristics, it finds use in a wide range of disciplines and uses ranging from survival activities, bushcraft or as an element of an EDC (Every Day Carry) kit.It was designed in collaboration with Daniele Dal Canto, Master Advanced F.I.S.S. (Italian Federation of Sport and Experimental Survival) instructor.
In Neck Knife mode, through the use of a 550 paracord lanyard, it can be held around the neck while keeping the knife upright with the handle facing down. Metal eyelets on the sheath made of pre-shaped Kydex allow for the attachment of both the lanyard and accessory holder.
The full-tang skeletonized design, allows the knife to be customized using Paracord as a handle covering
The Black S600 version uses Böhler S600 steel. This steel is used in industrial manufacturing to make metalworking tools and in mold making.
Satre S600 is hardened and cryogenically treated, thus achieving an exceptional hardness of as much as 64 HRC. This gives it great wear resistance and the ability to guarantee a long edge cutting edge.
Intended Use: Neck Knife / Hiking / UtilityType of production: industrial
Country of production: Italy
Blade: Bohler S600 64HRC carbon steel
Blade treatment:Black EXP DARK
Handle:carbon steel Bohler S600 64HRC
Blade length: 70mm.
Blade thickness: 5mm.
Total length: 163mm.
Weight: 78g.
Scabbard:Kydex, for neck
Packaging: cardboard box with Extrema Ratio logos.
Notes: previously purchased and used knife, withdrawn from a private collection - possibility to use the sheath with Ulti-Clip, M.O.L.L.E. or Tek-Lok systems (can be purchased separately)ER-SAT-S6-CP -
ExtremaRatio - Nemesis knife - USED - PRIVATE COLLECTION - knife
KNIFE WITHDRAWN FROM PRIVATE COLLECTION
* Origin: Withdrawn from a private collection, previously purchased and used.
* Condition: Overall in good condition, knife only, no packaging and paper warranties.
* Commercially available: Discontinued
* Sharpening: Professionally re-sharpened.
* Marks on blade: Normal signs of wear and tear.
* Marks on handle: Several small abrasions on handle and opening pins, hardware slightly discolored
* Box: Not present
* Scabbard: -
* Manuals, Certificates and Warranties: Not present
* Checked and Certified by our in-house laboratory.The Extrema Ratio Nemesis knife is an excellence in the world of tactical tools, designed to deliver superior performance in high-intensity situations. With a strong and versatile blade made of high-quality steel, the Nemesis is ideal for professional use and for those seeking a durable and precise knife. Its ergonomic design and secure grip make it a perfect ally in any environment, from combat to survival, with a focus on durability and handling.
Intended use: tactical/military/backup
Blade: made of N690Co 58HRC stainless steel with burnishing
Handle: made of anticorodal, with 4.5mm thickness
Blade length: 115mm.
Blade thickness: 6mm.
Length closed: 148mm.
Total length: 260mm.
Weight: 235g.
Closure: Back Lock with additional pin safety with both closed and open blade
Clip: burnished stainless steel, removable and reversible
Notes: previously purchased knife from a private collectionER-NEM-USCP -
Extrema Ratio - Waki Knife 30cm. - N690 - PRIVATE COLLECTION - Collectible Knife
WITHDRAWN FROM A PRIVATE COLLECTION
- Type: Previously Purchased
- Condition: In excellent condition
- Market Availability: First version with leather sheath
- Factory Sharpened: Yes
- Blade Marks: None
- Handle Marks: None
- Packaging: Complete, cardboard box with manufacturer logos
- Sheath: Leather
- Manuals, Certificates, and Warranties: Warranty certificates
- Checked and Certified: By our internal laboratory
Intended Use: Roasting
- Production Type: Industrial
- Blade Production: Italy
- Blade: N690Co stainless steel, hardened to 58HRC
- Blade Treatment: Satin finish
- Handle: Forprene
- Blade Length: 300mm
- Blade Thickness: 6.5mm at the handle, 4mm on the blade
- Total Length: 433mm
- Weight: 336g
- Sheath: Black leather
- Packaging: Cardboard box with Extrema Ratio logos
- Note: Also suitable as a sports or collectible knife
Extrema Ratio has applied its rigorous military standards to a series of professional kitchen knives.
The blade is made of tested BOHLER N690 steel, enriched with chromium, vanadium, molybdenum, and cobalt, hardened to 58HRC. The handle is made of Forprene, an elastomer that meets NATO standards for resistance to extreme conditions and is fully removable from the blade, allowing for thorough cleaning and maintenance.
Each knife comes with its own sheath, also derived from military equipment. While not designed to meet hygiene regulations, it ensures safe transport of the extremely sharp blade and protects it from impacts that could reduce its efficiency. We recommend using the sheath only for transportation and long-term storage.
ER12320 -
Extremaratio - Col Moschin Desert Warfare - With Department Logos - PRIVATE COLLECTION - knife
KNIFE WITHDRAWN FROM PRIVATE COLLECTION
* Provenance: withdrawn from a private collection, previously purchased.
* Condition: New, never used, no original box
* Commercially available: Still in catalog, but now offered without “9th Col Moschin” logos on the blade
* Sharpening: Factory.
* Marks on blade: None
* Marks on handle: None
* Box: Absent
* Scabbard: Present, new
* Manuals, Certificates and Warranties: Present
* Checked and Certified by our in-house laboratory.
Commissioned and officially adopted in 2002 by the well-known 9th Incursor Rgt. “Col Moschin”, this model expresses the quintessence of the pure combat knife.Inspired by the daggers with asymmetric blade and straight but oriented handle of the Arditi, from which the Regiment draws its vestiges, it has been reworked in a modern key. The center of gravity is strongly set back, the point particularly piercing. It is light, maneuverable and intuitive.
Every new raider gets one, every new raider is trained to use it to the fullest.
Intended use: Collector/Tactical/MilitaryBlade: N690Co 58HRC stainless steel with Desert Warfare finish
Handle: Forprene
Blade length: 160mm.
Blade thickness: 6.3mm.
Total length: 290mm.
Balance: set back, 1 cm. from the lower guard branch
Weight: 264g.
Sheath: Nylon, modular, thigh or belt, with removable inner plastic shell
Notes: previously purchased knife, from private collectionER-CMDW-CP -
ExtremaRatio - MF1 BC Black - PRIVATE COLLECTION - tactical emergency knife
KNIFE WITHDRAWN FROM PRIVATE COLLECTION
* Type: Previously purchased, from a private collection.
* Condition: in good condition
* Commercially available: discontinued and no longer available.
* Sharpening: Factory sharpened, improvable
* Marks on blade: Small marks near the edge, due to time and use.
* Marks on handle: Small marks from time and use - Hardware and clip show discoloration
* Box: Absent
* Manuals, Certificates and Warranties: Absent
* Checked and Certified by our in-house laboratory.
MF stands for Medium Folder. This line of knives fits in between the Basic Folders series and the Heavy Folders series. The typical mechanism of the series is the LINER-LOCK. The overall structure is sturdy.All knives in the MF series have a rear glass breaker. They also feature the innovation of the adjusting counterscrew at the blade attachment stud. By removing the counterscrew, the center pin can be tightened or loosened at will, so as to achieve the desired smoothness of opening. It will be sufficient to re-lock the pivot screw with the counterscrew to secure the adjustment.
The BC (Belt Cutter) version features the rear belt cutter with an easily available and replaceable industrial cutter blade. In addition, a slotted screwdriver is inserted inside the grip to allow adjustment and calibration of firearm optics.
Intended Use: Tactical/Emergency
Production Type: Industrial
Country of manufacture: Italy
Blade: Stainless steel N690Co 58HRC
Blade Finish: Burnishing
Handle: Anticorodal
Blade length: 95mm.
Blade thickness: 4mm.
Length closed: 134mm.
Total length: 225mm.
Thickness when closed: 24mm.
Weight: 162g.
Closure: Liner Lock with additional safety catch
Clip: burnished stainless steel, deep pocket, removable and reversible
Notes: belt cutter, glass breaker, optics screwdriver - previously purchased knife from a private collectionER-MF1BCBK-CP -
Bark River - Bushcrafter II - CPM-3V & Desert Ironwood Burl #1 - PRIVATE COLLECTION - knife
PREVIOUSLY PURCHASED KNIFE, WITHDRAWN FROM PRIVATE COLLECTION
* Type: knife previously purchased, withdrawn from a private collection
* Condition: Like new, never used, never taken out of the box and never placed in the sheath.
* Commercially available: Hard to find with this particular briar handle
* Sharpening: Factory sharpened
* Marks on blade: None
* Marks on handle: None
* Box: Present
* Scabbard: Present, new, never removed from plastic packaging still sealed.
* Manuals, Certificates and Warranties: Present
* Checked and Certified by our in-house laboratory.The Bark River Bushcrafter II is designed to be the ultimate bushcraft knife. The name itself is no accident: careful research has led to an exceptional result that is appreciated by enthusiasts in the field. The blade has an ideal shape for bushcraft activities, while the handle offers excellent ergonomics. Compared to the standard model, the Bushcrafter II is slightly larger, with a blade over an inch longer.
Made of CPM 3V steel, the blade is extremely durable and retains its sharpness for a long time. However, it is not completely stainless, so it should be cleaned after use and occasionally oiled to prevent corrosion. The edge has a convex bevel, which is easy to maintain by sanding.
The handle is made of fine desert ironwood burl, a hardwood from the U.S. and Mexico, featuring an elegant grain that gives the knife a luxurious look. The leather sheath allows for both vertical (belts up to 2 inches) and diagonal carry.
Each Bark River knife is handcrafted and one-of-a-kind.
Intended Use: Hiking / Utility / Bushcraft
Country of manufacture: USA
Blade: full tang made of CPM-3V carbon steel at 61HRC
Handle: desert ironwood burlwood
Blade length: 113mm.
Blade thickness: 4.1mm.
Total length: 233mm.
Weight: 205g.
Sheath: leather, belt
Notes: knife from a private collection, like new, never taken out of its box and never placed in the sheathBR-BUII3V-CP -
ExtremaRatio - Ti-Rock Tactical Version - 100pcs. Limited Edition - USED - knife
KNIFE WITHDRAWN FROM PRIVATE COLLECTION
* Origin: Collected from a private individual, previously purchased and used.
* Condition: Used, overall in good condition, with slight signs of wear and tear.
* Commercially available: Discontinued
* Sharpening: Re-sharpened, sharpening can be improved.
* Marks on blade: Small signs of wear and tear.
* Marks on handle: Small signs of wear and minimal scratches, anodizing slightly faded by time in places
* Box: Present
* Scabbard: -
* Manuals, Certificates and Warranties: Present
* Checked and Certified by our in-house laboratoryKnife withdrawn from private collection - Ti-Rock model no. 38 of 100 pieces made by Extrema Ratio in collaboration with Coltelleria Collini - Knife discontinued since 2016
Intended use: collection / EDC / CQDType of production: industrial, limited
Blade: N690 stainless steel at 58HRC with compound type sharpening
Blade finish: burnished
Country of manufacture: Italy
Handle: anodized Titanium, machined from solid, with integral Frame Lock locking system with removable stainless steel strike and safety
Blade length: 75mm.
Blade thickness: 6.3mm.
Total length: 180mm.
Weight: 190g.
Clip: stainless steel, reversible, deep pocket, tip up
Notes: tapered skull crasher engaged in the tang
Box: cardboard, numbered, with ExtremaRatio and Coltelleria Collini logos
Notes: Skull Crasher conical grafted in the tang - Made only in 100 numbered examples on blade and boxE-TROT-CP -
ExtremaRatio - MPC knife Selected Shooters - PRIVATE COLLECTION - knife
- Origin: Withdrawn from a private owner, previously purchased
- Condition: Overall in excellent condition
- Availability: Discontinued
- Sharpening: Original sharpening
- Blade marks: /
- Handle marks: Minor marks
- Box: /
- Sheath: /
- Manuals, Certificates, and Warranties: /
- Inspected and Certified: By our internal laboratory
The Extrema Ratio M.P.C. (Multi Purpose Compact) is an Italian-made folding knife designed to offer the durability of a fixed-blade knife in a compact and versatile format. Made with high-quality materials and precision techniques, it is ideal for tactical uses and field operations.
- Intended use: Tactical / Multi-role
- Production type: Industrial
- Country of origin: Italy
- Blade: Böhler N690 steel (58HRC)
- Blade finish: Testudo (brunished)
- Handle: Black anodized Anticorodal aluminum alloy
- Blade length: 113 mm
- Blade thickness: 6 mm
- Closed length: 149 mm
- Total length: 260 mm
- Closed thickness: 20 mm
- Weight: 240 g
- Locking system: Back lock with additional safety system
- Clip: Removable and reversible, brunished stainless steel
- Packaging: -
- Notes: The blade features partial serration for efficient cutting of cables and high-resistance fabrics.
The M.P.C. was developed to replace or complement a fixed-blade knife, combining the portability of a folder with the strength required for heavy-duty tasks. Its thick blade and robust locking system make it one of the most reliable tools in its category.
AP-MPC -
Bark River - Ultralite Field Knife - CPM-3V & Desert Ironwood Root #5 - PRIVATE COLLECTION - knife
PREVIOUSLY PURCHASED KNIFE, RETRIEVED FROM PRIVATE COLLECTION
* Type: previously purchased knife, from a private collection
* Condition: "First Production Run" edition, like new, never used, never removed from the packaging, and never placed in the sheath
* Available on the market: Out of production
* Sharpening: Factory
* Marks on blade: None
* Marks on handle: None
* Box: Present
* Sheath: Present, also includes a second new leather sheath
* Manuals, Certificates and Warranties: Present
* Checked and Certified by our internal laboratoryThe Bark River Ultra Lite Field Knife is a versatile knife designed to excel in bushcraft activities but capable of handling many other functions. Its clip/harpoon blade is made of CPM 3V steel, offering excellent resistance and holds its edge well, making it ideal for processing game and food preparation. However, it is important to protect it from moisture and acids, as it is not completely stainless; regular maintenance, such as cleaning and applying oil, is recommended to preserve its quality.
The handle is made from a wonderful desert ironwood burl, a precious wood that has a unique and variable appearance. Each handle is different, reflecting the value of the natural product. The entire design of the knife makes it an excellent tool for both practical use and for those seeking a distinctive item.
Intended use: Hiking / Utility / Bushcraft
Country of production: USA
Blade: full tang made of CPM-3V carbon steel at 61HRC
Handle: desert ironwood burl
Blade length: 115mm.
Blade thickness: 3.2mm.
Total length: 213mm.
Weight: 125g.
Sheath: leather
Notes: knife from a private collection, like new, never removed from its packaging and never placed in the sheath - Out of production and no longer available on the market, differs from the standard production by the use of burl wood for the handle - "First Production Run" engraved on the bladeBR-UFK3V-CP -
Bark River - Aurora II - CPM-3V & Desert Ironwood #2 - PRIVATE COLLECTION - knife
PREVIOUSLY PURCHASED KNIFE, WITHDRAWN FROM PRIVATE COLLECTION
* Type: Knife previously purchased, from a private collection
* Condition: Like new, never used, never removed from its packaging, and never inserted in the sheath
* Availability: Out of production
* Sharpening: Factory edge
* Blade marks: None
* Handle marks: None
* Box: Present
* Sheath: Present, with an additional new leather sheath
* Manuals, Certificates, and Warranties: Present
* Inspected and Certified by our internal laboratoryThe Bark River Aurora II is designed as the ultimate bushcraft knife, a result of extensive testing conducted by experts in North America and Europe. This outdoor knife, perfected through feedback received, is notable for its balance and versatility. The blade, made of CPM 3V steel, is renowned for its exceptional strength and its ability to retain an excellent edge over time. However, it is important to watch for moisture and acids, as CPM 3V is not completely stainless. Cleaning the knife after use and occasionally applying oil is recommended to ensure its longevity.
The Aurora II, significantly larger than the standard model, features a pointed tip ideal for detailed tasks and a spine suited for use with a fire starter. These characteristics make it an indispensable tool for outdoor activities.
The handle is made of desert ironwood, a hardwood appreciated for its color and unique pattern, giving the knife a luxurious look and improving grip. Each piece is handmade by Bark River, meaning that every knife is unique and may have slight variations compared to the images.
Intended Use: Hiking / Utility / Bushcraft
Country of Manufacture: USA
Blade: Full tang in CPM-3V carbon steel at 61 HRC
Handle: Desert ironwood
Blade Length: 140mm.
Blade Thickness: 3.85mm.
Total Length: 264mm.
Weight: 195g.
Sheath: Leather, with an additional leather sheath
Notes: Knife from a private collection, like new, never removed from its packaging and never inserted in the sheath, provided with an additional sheath, out of production and no longer available on the marketBR-AUII3V-CP -
Extremaratio - Col Moschin Desert Warfare - PRIVATE COLLECTION - knife
KNIFE WITHDRAWN FROM PRIVATE COLLECTION
* Provenance: withdrawn from a private collection, previously purchased.
* Condition: Overall in good condition.
* Commercially available: Still in catalog.
* Sharpening: Factory.
* Marks on blade: Marks and abrasions.
* Marks on handle: Small signs of wear and tear.
* Box: Present, not complete (absence of warranties and plastic bags).
* Scabbard: Present, in good condition.
* Manuals, Certificates and Warranties: - -
* Checked and Certified by our in-house laboratory.
Commissioned and officially adopted in 2002 by the renowned 9th Incursor Rgt. “Col Moschin,” this model expresses the quintessence of the pure combat knife. Inspired by the daggers with asymmetric blade and straight but oriented handle of the Arditi, from which the Regiment draws its vestiges, it has been reworked in a modern key.The center of gravity is strongly set back, the point particularly piercing. It is light, maneuverable and intuitive. Every new raider receives one, every new raider is trained to use it to the fullest.
Intended use: Collector/Tactical/MilitaryBlade: N690Co 58HRC stainless steel with Desert Warfare finish
Handle: Forprene
Blade length: 160mm.
Blade thickness: 6.3mm.
Total length: 290mm.
Balance: set back, 1 cm. from the lower guard branch
Weight: 264g.
Sheath: modular tactical, thigh or belt, Nylon
Notes: -ER-COL-DW-CP -
Extremaratio - Arditi Black - Single Edge Dagger - PRIVATE COLLECTION - Knife
KNIFE WITHDRAWN FROM PRIVATE COLLECTION
* Provenance: withdrawn from a private collection, previously purchased.
* Condition: Overall in good condition
* Commercially available: Still in catalog.
* Sharpening: Factory.
* Marks on blade: Marks and abrasions.
* Marks on handle: Small signs of wear and tear.
* Box: Present, not complete (absence of warranties and plastic bags).
* Scabbard: Present, in good condition.
* Manuals, Certificates and Warranties: - -
* Checked and Certified by our in-house laboratoryIntended Use: Tactical/Military/Collection
Production type: Industrial
Country of Production: Italy
Blade: stainless steel N690Co 58HRC
Blade Treatment: Burnishing MIL-C-13924
Handle: Polymer
Blade Length: 167mm.
Blade thickness: 6.3mm.
Total length: 270mm.
Weight: 224g.
Sheath: Nylon thigh piece
Packaging: cardboard box with Extrema Ratio logos
Notes: Limited edition in 2018 pieces - Edition to celebrate 100 years of the Italian ArditesER-AR-BK-CP -
ExtremaRatio - Giant Mamba Knife - Black - USED - tactical knife
KNIFE WITHDRAWN FROM A PRIVATE COLLECTION
* Origin: Withdrawn from a private individual, previously purchased
* Condition: USED
* Commercially available: available
* Sharpening: resharpened by our internal laboratory
* Signs on the blade: has superficial scratches on the entire blade on both sides of the blade (visible in the photos) which do not compromise the quality but only the aesthetics
* Signs on the handle: None
* Box: YES
* Sheath: Yes
* Manuals, Certificates and Guarantees: Yes
* Checked and Certified by our internal laboratoryThe Giant Mamba has a tanto blade in Böhler N690 steel, 6.3 mm thick with a hardness of 58 HRC, flat edge and full-length lightening fuller.
The Forprene handle with threaded tang lock makes the knife solid and well-balanced. The sheath, M.O.L.L.E. compatible, is made of shock-absorbing nylon with a conical guide for quick insertion and extraction and a system that prevents shaking noises, it is equipped with a two-button safety flap, a thigh with anti-rotation rubber reinforcement and an ambidextrous reversible safety: simply pressing the trigger unlocks the blade.
Intended use: Tactical / Multi-role
Type of production: Industrial
Country of production: Italy
Blade: N690Co 58HRC stainless steel
Blade treatment: Mil-C-13924 burnishing
Handle: Forprene
Blade length: 163mm.
Blade thickness: 6.3mm.
Total length: 293mm.
Weight: 289g.
Sheath: Nylon
Packaging: Cardboard box with Extrema Ratio logos
Notes: -AP-ER-GMA-BK -
Citadel - Hunting knife - PRIVATE COLLECTION - handmade knife
KNIFE WITHDRAWN FROM A PRIVATE COLLECTION
* Origin: Withdrawn from a private individual, previously purchased
* Conditions: in like-new condition
* Available on the market: No longer available
* Sharpening: Factory
* Marks on blade: None
* Marks on handle: None
* Box: /
* Sheath: hand-made leather in good condition
* Manuals, Certificates and Guarantees: No
* Checked and Certified by our internal laboratoryIntended use: collection/sports
Type of production: Handcrafted
Blade production: Cambodia
Blade: mirror-finish DNH7 carbon steel
Blade treatment: brut de forge
Handle: wood and horn
Blade length: approx. 120mm.
Blade thickness: approx. 5.5mm.
Total length: approx. 250mm.
Balance: -
Weight: approx. 228g.
Lock: 1.5cm set back
Sheath: Handcrafted leather
Notes: -Citadel Knives and Swords is a sword and knife manufacturer based in Phnom Penh, Cambodia. Despite the country's reputation as an exotic and remote location, the company is easily accessible, located close to the city's international airport. The workshop is modest but houses an impressive range of high-quality Japanese swords and knives.
Founded by Dominique Eluere in the 1990s, Citadel has combined the expertise of French and local craftsmen to produce blades that rival the best in the world. Eluere began by training Cambodian blacksmiths to make French table knives, later evolving into the production of Japanese swords.
The quality of Citadel swords is world renowned, thanks to the use of traditional Japanese techniques and a meticulous manufacturing process. Each katana is heat treated, creating a blade with varying hardness along the edge and spine, a hallmark of true katanas. The hilt is fully encased in high-quality stingray leather, a rarity compared to common panels.
Attention to detail extends to every element, with every component custom-made for each blade. This includes the tsuba (sword guard) and habaki (blade collar), both of which are hand-crafted and fitted, ensuring perfect fit and functionality.
In addition to katanas, Citadel also produces European swords and knives, maintaining the same philosophy of quality and functionality. Production is artisanal, with particular attention to polishing and finishing, often done by hand with sandpaper and whetstones.
Citadel is proud of its Cambodian roots, with local workers looking up to Eluere as a father figure and deeply involved in maintaining the company's high standards.
In short, Citadel Knives and Swords represents a perfect fusion of tradition, craftsmanship and innovation, offering products that are truly functional works of art. These tools, while expensive, represent an investment in quality and craftsmanship that is hard to match.
AP-CIT-COR -
ExtremaRatio - Shrapnel OG - Satin San Mai CoS Limited Edition - PRIVATE COLLECTION - knife
KNIFE WITHDRAWN FROM PRIVATE COLLECTION
* Origin: Withdrawn from a private collection, previously purchased.
* Condition: Like new
* Commercially available: Discontinued, only made in 30 pieces
* Sharpening: Factory sharpened
* Marks on blade: None
* Marks on handle: None
* Box: Present
* Scabbard: Present
* Manuals, Certificates and Warranties: Present
* Checked and Certified by our in-house laboratory
Use: tactical, sporting, hiking, collectionBlade: integral, rolled Japanese stainless steel (San Mai) with 61.5HRC cryogenically hardened CoS cutting edge
Handle: forprene
Blade length: 90mm.
Blade thickness: 6.5mm.
Total length: 210mm.
Balance: set back 0.5cm. from the guard branch
Weight: 214g.
Sheath: ABS with multi-position Tek-Lok attachment
Notes: new knife, withdrawn from private collectionsERCC-SH-CP -
ExtremaRatio - BD2 R Satin knife - PRIVATE COLLECTION - knife
KNIFE RETIRED FROM PRIVATE COLLECTION
* Type: Previously Purchased
* Condition: In very good condition
* NO longer available on the market
* Sharpening: Factory
* Marks on blade: None
* Marks on handle: Very small marks
* Box: Present
* Sheath: -
* Manuals, Certificates and Guarantees: ER
* Checked and certified by our internal laboratoryMedium folding bag from the BD series. It is produced with an aluminum handle which enhances its characteristics of resistance and lightness, also thanks to the steel frame. The model maintains all the features of the BD2 updated with the new High Speed Razor Opening system.
Intended use: Sports / EDC
Type of production: Industrial
Blade production: Italy
Blade: N690Co 58HRC stainless steel
Blade treatment: Satin
Handle: Anticorodal
Blade length: 95mm.
Blade thickness: 3mm.
Closed length: 128mm.
Total length: 224mm.
Closed thickness: 17mm.
Weight: 105g.
Closure: Liner Lock
Clip: removable in stainless steel
Packaging: cardboard box with Extrema Ratio logos
Note: -AP-ER-BD2R -
ExtremaRatio - MF0T Zero Oxide Grey 33pcs. Limited Edition - PRIVATE COLLECTION - knife
Exclusive limited edition series in collaboration with INSTRUCTOR ZERO (Team Zero International Training Security Company), renowned firearms training specialist, risk analyst and strategic consultant working worldwide for both military and law enforcement specialized units and government agencies.
KNIFE WITHDRAWN FROM PRIVATE COLLECTION
* Provenance: withdrawn from private collection, previously purchased.
* Condition: New, never used
* Commercially available: Discontinued, limited run of only 33 numbered pieces
* Sharpening: Factory sharpened
* Marks on blade: None
* Marks on handle: None
* Box: Present
* Scabbard: /
* Manuals, Certificates and Warranties: Present
* Checked and Certified by our in-house laboratoryIntended Use: Tactical / Collection
Production type: Industrial
Country of Production: Italy
Blade: Stainless steel N690Co 58HRC
Blade Treatment: Testudo MIL-C-13924
Handle: Anticorodal
Blade Length: 68mm.
Blade thickness: 4mm.
Length closed: 110mm.
Total length: 181mm.
Thickness when closed: 23mm. (15mm without clip)
Weight: 139g.
Closure: Liner Lock with additional safety catch
Clip: Stainless Steel
Packaging: watertight plastic box with Extrema Ratio and Team Zero logos, Warranty Certificate, Velcro Patch, Limited edition made in only 33 piecesER-MF0TBZOG -
ExtremaRatio - MF1 BC knife - PRIVATE COLLECTION - tactical knife
Type: Previously Purchased
Condition: in excellent condition
Available in the market, currently in production
Sharpening: Factory standard
Blade marks: None
Handle marks: None
Box: Present
Sheath: Not applicable
Manuals, Certificates, and Warranties: ER
Checked and Certified by our internal laboratory
Intended use: Tactical/EmergencyType of production: Industrial
Blade Production: Italy
Blade: N690Co stainless steel, 58HRC
Blade Treatment: Testudo
Handle: Anticorodal
Blade length: 95mm
Blade thickness: 4mm
Closed length: 134mm
Total length: 225mm
Closed thickness: 24mm
Balance: Not applicable
Weight: 162g
Closure: Liner Lock
Clip: Stainless Steel
Sheath: Not applicable
Packaging: black cardboard box with Extrema Ratio logos
Notes: seat belt cutter, glass breaker, screwdriver for opticsAP-MF1-BC-CP -
ExtremaRatio - MPC Desert Warfare - 2014 Full Set - PRIVATE COLLECTION - Knife
KNIFE WITHDRAWN FROM PRIVATE COLLECTION
* Type: Previously Purchased
* Condition: 2014 knife overall in near new, unused condition, some minor marks on metal parts given by age
* Commercially available Discontinued.
* Sharpening: Factory sharpened, never used for cutting.
* Marks on blade: No
* Marks on handle: Some discoloration of laser engravings given by age.
* Box: Present
* Scabbard: -
* Manuals, Certificates and Warranties: Present
* Checked and Certified by our in-house laboratory
Intended Use: Tactical / Multirole
Production type: Industrial
Country of Production: Italy
Blade: stainless steel N690Co hardened to 58HRC
Blade Finish: Desert Warfare
Handle: Anticorodal with stainless steel spacer
Blade length: 115mm.
Blade thickness: 6.3mm.
Total length: 260mm.
Weight: 245g.
Lock system: Back Lock with additional safety pin
Packaging: cardboard box with Extrema Ratio logos
Notes: Previously purchased discontinued specimen from a private collection. Full set, in near-new conditionER-MPCDW-CP -
ExtremaRatio - MF0 Drop Point Black - PRIVATE COLLECTION - folding knife
KNIFE WITHDRAWN FROM PRIVATE COLLECTION
* Type: Previously Purchased
* Condition: Overall in good condition.
* Commercially Available Available.
* Sharpening: Factory.
* Marks on blade: A couple of light marks on burnishing.
* Marks on handle: Slight signs of wear on hardware and clip.
* Box: Present, but not in perfect condition
* Scabbard: -
* Manuals, Certificates and Warranties: Present
* Checked and Certified by our in-house laboratory
Intended Use: Tactical/Sporting
Production Type: Industrial
Country of Production: Italy
Blade: Stainless steel N690Co 58HRC
Blade Finish: Burnishing MIL-C-13924
Handle: Anticorodal (aluminum)
Blade length: 68mm.
Blade thickness: 4mm.
Length closed: 110mm.
Total length: 181mm.
Thickness when closed: 15mm.
Weight: 139g.
Closure: Liner Lock, with additional safety catch
Clip: stainless steel removable and reversible
Packaging: cardboard box with Extrema Ratio logosAP-MF0D-CP -
ExtremaRatio - Shrapnel knife - Testudo - 1st series 2004 - PRIVATE COLLECTION - knife
KNIFE WITHDRAWN FROM PRIVATE COLLECTION
* Type: Previously Purchased - year of production 2004 - 1st series Shrapnel with double guard branch and kydex sheath
* Conditions: Like new
* Commercially available Yes
* Sharpening: Original
* Marks on blade: NO
* Signs on handle: NO
* Packaging: NO
* Sheath: In kydex
* Manuals, Certificates and Guarantees: YES
* Checked and Certified by our internal laboratoryIntended Use: Military/Tactical
Type of production: industrial
Blade production: Italy
Blade: N690Co 58/60HRC stainless steel
Blade treatment: MIL-C 13924 bluing
Handle: Forprene
Blade length: 110mm.
Blade thickness: 6.3mm.
Closed length: 142mm.
Total length: 210mm.
Weight: 210g.
Clips: absent
Sheath: ABS sheath with Tek-Lok attachment with automatic knife retention system.
Note: -ER-SHR-BK-1 -
ExtremaRatio - BF3 knife - Dark Talon - Afghanistan Edition - PRIVATE COLLECTION - knife
KNIFE WITHDRAWN FROM PRIVATE COLLECTION
* Type: Previously Purchased - Limited Edition supplied by Extrema Ratio for Task Force 45 (TF-45) joint military unit of Italian special forces, operating in Afghanistan from at least June 2006 to 2016, as part of Operation "Sarissa" of the International Security Assistance Force (ISAF).
* Conditions: Like new
* Commercially available No in the version with engraving -
* Sharpening: Original
* Marks on blade: NO
* Signs on handle: NO
* Packaging: YES
* Sheath: -
* Manuals, Certificates and Guarantees: YES
* Checked and Certified by our internal laboratoryIntended use: Sport / Tactical
Type of production: Industrial
Blade production: Italy
Blade: N690Co 58HRC stainless steel
Blade treatment: Testudo
Handle: Anticorodal
Blade length: 125mm.
Blade thickness: 3mm.
Closed length: 150mm.
Total length: 270mm.
Closed thickness: 17mm.
Balancing: -
Weight: 120g.
Closure: Liner Lock
Clip: removable in stainless steel
Scabbard: -
Packaging: cardboard box with Extrema Ratio logos
Note: -AP-ER-BF3-A -
Bark River - Bravo 1 Field Knife - Mil-Spec - Camo G-10 - COLLEZIONE PRIVATA - coltello
COLTELLO RITIRATO DA COLLEZIONE PRIVATA
* Tipologia: Precedentemente Acquistato
* Condizioni: Globalmente in buone condizioni
* Reperibile in commercio: non più in produzione
* Affilatura: Di fabbrica
* Segni su lama: Leggeri
* Segni su impugnatura: No
* Scatola: Non presente
* Fodero: In Cuoio
* Manuali, Certificati e Garanzie: NO
* Controllato e Certificato dal nostro laboratorio internoDestinazione d'uso: Tattico/Collezione
Tipo di produzione: Semi-Industriale
Paese di produzione: USA
Lama: in acciaio inox CPM-S35VN
Trattamento lama: satinatura
Manicatura: G-10 Camo
Lunghezza lama: 110mm.
Spessore lama: 5.5mm.
Lunghezza totale: 244mm.
Bilanciatura: arretrata di circa 2 cm dal bordo della guancetta
Peso: 240g. (350g. fodero compreso)
Fodero: In cuoio
Confezione: privo di scatola e certificati
Note: -AP-BRAVO1 -
ExtremaRatio - Fulcrum Civil Bayonet Knife NFG Black - USED - PRIVATE COLLECTION - Knife
KNIFE WITHDRAWN FROM PRIVATE COLLECTION
* Origin: Collected from a private individual, previously purchased and used.
* Condition: Used, with obvious cosmetic signs of wear and tear, in no way compromising its use
* Commercially available: Discontinued, demilitarized version, without attachments and with top sharpening removed
* Sharpening: Factory (can be improved)
* Marks on blade: Various signs of wear, cosmetic in nature.
* Marks on handle: Various signs of wear, cosmetic in nature.
* Box: Present, original, complete
* Scabbard: Present, original, used, in good condition.
* Manuals, Certificates and Warranties: Present
* Checked and Certified by our in-house laboratoryIntended use: tactical/military/multi-role
Blade: full tang in N690Co 58HRC stainless steel with front upper portion of blade NOT sharpened
Handle: detachable in Forprene
Blade length: 180mm.
Blade thickness: 6.3mm.
Total length: 310mm.
Balance: advanced, 1.5cm from the lower guard branch
Weight: 378g.
Sheath: modular tactical with thread cutter, thigh or belt, Nylon - includes diamond sharpener and magnesium fire starterSheath: modular tactical with thread cutter, thigh or belt, Nylon - includes a diamond sharpener and magnesium fire starter
ER-FUBB-US















































