C275 ButtonUp

The C275 ButtonUp is Spyderco's first folding knife design to use a button-lock locking mechanism.

Appearance in catalogs

The C275 ButtonUp appeared in the following catalogs:

• 2025 Spyderco Reveal Volume 18

Designer

Eric Glesser

History, mentionings from the forums etc.

• ButtonUp, posted by forum member RugerNurse.

Information from the Spyderco catalog on the web

C275 ButtonUp

"Designed by Eric Glesser, the ButtonUp™ is Spyderco’s first-ever manual-opening button-lock folder. It combines a high-strength, ultra-convenient button-lock mechanism with ball bearing pivot washers to yield one of the smoothest and most “fidget-friendly” folder actions we have ever produced. Its modified clip point blade is crafted from 8Cr13MoV stainless steel and boasts a full-flat grind for superior edge geometry and strength. The blade is housed in a lightweight, easy-to-clean, open-backed handle constructed with smooth carbon fiber/G-10 laminate scales reinforced with nested stainless steel microliners around the pivot and lock. To ensure convenient carry and keep the ButtonUp poised for quick access, it includes a reversible hourglass clip that provides a choice of left- or right-side tip-up carry. The clip anchors to a second set of microliners nested in the butt of the handle and straddles a lined lanyard tube that allows the easy attachment of fobs and lanyards.

The ButtonUp is available in two different versions: one with a satin-finished blade and brightly finished handle hardware and an all-black theme featuring a black oxide blade coating and matching black-coated hardware. Both are available with a choice of PlainEdge™ or partially serrated CombinationEdge™ blade configurations."

Variations

The C275 ButtonUp is made in China and features:

• A Button-Lock locking mechanism.
• Ball bearing pivot washers.
• A modified Clip Point Blade.

SKU	Handle	Edge(s)	Steel	From/To	MSRP	Note	Number made	Grind	Clip	Clip positions	Collectors club
C275CF	Smooth finished Carbon Fiber/G-10	PE, CE	8Cr13MoV	2025 -	$100.00 (2025)		Regular production	Full Flat grind	Chrome 4-way	LH/RH, TU	Main
C275CFBK	Smooth finished Carbon Fiber/G-10	PE, CE	Black oxide-coated 8Cr13MoV	2025 -	$105.00 (2025)	Features all-black hardware.	Regular production	Full Flat grind	Black 4-way	LH/RH, TU	Main

Most collectible variation

Any variation of the C275 in mint condition with original packaging and paperwork would be considered collectible.

Questions regarding collecting the C275

Some interesting questions we are looking for an answer to:

Questions with an answer:

Technical information

Measurements (mm and grams) of the C275 ButtonUp:

Variation	Length overall	Length closed	Length blade	Length edge	Blade thickness	Weight
C275CFP	195.072mm	112.522mm	83.058mm	68.834mm	3mm	60g

Measurements (inches and ounces) of the C275 ButtonUp:

Variation	Length overall	Length closed	Length blade	Length edge	Blade thickness	Weight
C275CFP	7.68in	4.43in	3.27in	2.71in	0.118in	2.1oz

Pictures

The C275CFP ButtonUp, open and closed.

The C275CFPBK ButtonUp, open and closed.