Approved - knives withdrawn from private collections, checked, overhauled and certified by Coltelleria Collini

KNIFE PREVIOUSLY PURCHASED, FROM A PRIVATE COLLECTION
* Origin: Acquired from a private individual, previously purchased
* Condition: Overall in excellent condition
* Commercial Availability: Discontinued in this steel variant
* Sharpness: Factory-sharpened
* Marks on blade: None
* Marks on handle: Minor cosmetic signs of wear on the clip and screws
* Box: Included
* Sheath: -
* Manuals, Certificates, and Warranties: Included
* Inspected and certified by our in-house laboratory

The Microtech Socom Elite is one of the most iconic folding knives produced by Microtech, prized for its combination of durability, ergonomics, and reliability. Designed for professional and tactical use, over the years it has also established itself as a benchmark among collectors and enthusiasts of high-end cutlery.

The model presented here, manufactured in 2019, features a blade made of Carpenter CTS-204P steel, one of the best high-performance stainless steel alloys in its class, known for its excellent edge retention, high corrosion resistance, and outstanding wear resistance. The black/dual-tone finish contributes to its particularly aggressive and professional appearance.

The aluminum handle with non-slip inserts ensures a firm and comfortable grip even under the most demanding conditions, while the manual thumb stud opening system and the proven liner lock mechanism guarantee quick deployment and safety during use.

Thanks to Microtech’s signature build quality and a design that has become an industry classic, the Socom Elite is an excellent choice for both everyday use and for collectors seeking one of the most iconic models in the American brand’s modern lineup.

Intended Use: Tactical, EDC

Production Type: Industrial
Country of Manufacture: USA
Blade: Carpenter CTS-204P stainless steel
Blade Finish: “Normal” (Black PVD + Satin)
Handle: Aluminum with non-slip inserts
Blade Length: 101mm
Blade thickness: 4 mm
Closed length: 127 mm
Overall length: 228 mm
Closed thickness: 15 mm
Weight: 157 g
Lock type: Liner Lock
Clip: Stainless steel, removable
Packaging: Microtech box with manuals
Notes: Previously purchased knife, from a private collection

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 laboratory

The 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 collection

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 laboratory

The 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 81

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 laboratory

Directly 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/military

Blade: 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 collection

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 laboratory

The 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)

KNIFE WITHDRAWN FROM PRIVATE COLLECTION
* Origin: Collected from a private individual, previously purchased.
* Condition: Like new, never used
* Commercially available: Limited and numbered custom edition, discontinued
* Sharpening: Factory.
* Marks on blade: None
* Marks on handle: None
* Box: Present
* Scabbard: Present
* Manuals, Certificates and Warranties: Not Present
* Checked and Certified by our in-house laboratory

Microtech Marfione Custom ANAX - Limited Series 2015
In 2015, Anthony Marfione created a limited and numbered series of the famous ANAX, a folding integral knife that marked a turning point in custom design. Winner of the “Most Innovative Knife of the Year” award at the 2014 Blade Show, the ANAX combines functionality, futuristic aesthetics, and top-of-the-line materials. The custom models produced that year stand out for their handcrafted finishes, unique material variations, and exclusive accessories, quickly becoming collector's items coveted on a global scale.

Data Sheet.
Intended Use: Tactical, EDC
Type of production: Custom
Country of Production: USA
Blade: Elmax Stainless Steel
Blade Finish: Tri-Tone Black DLC
Handle: Carbon fiber and titanium with Black DLC finish and hardware
Blade length: 95mm
Blade thickness: 4mm
Length closed: 125mm
Total length: 219mm
Thickness when closed: 12mm
Weight: 99g
Closure: Sub Frame Lock in titanium with Black DLC finish
Clip: Titanium with Black DLC finish
Packaging: Marfione Custom box with external serial number, nylon zippered pouch, microfiber pouch, titanium patch with Marfione logo
Notes: 05/2015 limited run custom edition, specimen number 075, numbered on blade and box

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 collection

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 collection

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 laboratory

Knife 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 / CQD

Type 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 box

• 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.

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 laboratory

Medium 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: -

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 laboratory

Intended 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 pieces

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/Emergency

Type 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 optics

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 condition

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 logos

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 laboratory

Intended 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: -