OTHELLO ROSTFREI 1960s 23cm German Trap door Gravity knife military

Vintage 23cm German Military OTF Gravity knife was made in the late 1950s or 1960s for the German military by Anton Wingen company in Solingen Germany. This one measures 23.3cm (9 3/16 inches) open and 5.25 inches closed with a steel frame and nickel silver bolsters, lanyard ring, trapdoor and release lever. The blade appears to be 100% full with original finish and stamped on the face a bearded head outline over OTHELLO over ROSTFREI. The black scales are in good condition with some wear and lots of light scuffs/handling marks. German eagle symbol on the rear scale shows a lot of pocket wear, but still visible. Knife works perfectly. Blade drops out if pointed down and release pressed and falls back into the knife if pointed up when button pressed. EX- condition overall.