Vintage 23cm German Military OTF Gravity knife Eickhorn Solingen

Vintage 23cm German Military OTF Gravity knife. I believe these were made in the late 1950s or 1960s for the German military by Eickhorn company in Solingen Germany. This one is missing the door/end cover, but otherwise in pretty good condition. It measures just over 23cm (9 inches) open with a steel frame and nickel silver bolsters, lanyard ring and release lever. The blade appears to be mostly full with some original finish and lots of light scratches with slightly blunted tip and no markings. The black scales are in good condition with some wear and lots of light scuffs/handling marks. German eagle symbol on the rear scale. Knife works perfectly. Blade drops out if pointed down and release pressed and falls back into the knife if pointed up when button pressed. Good condition overall.