Case XX full size single blade Folding Hunter with Yellow Synthetic Handles. (3165 CV)  Chrome Vanadium High Carbon  Clip blade.  5 1/4" closed.  USA

NOTE:  Chrome Vanadium is a high carbon steel and NOT stainless.  Tarnishing and darkening of blade is a characteristic of this steel.  You may keep the blade clean, dry and oiled to help preserve the finish.