Blowback-operated semi-automatic chambered for 6.35mm cartridge. Has 3" barrel and 8-round detachable magazine. Weight about 18 oz. Fires by means of concealed hammer. Breech-block separate from rest of slide and held in place by a heavy crossbolt. Finish blued. Grips are molded checkered black plastic, with monogram "F.L." at top. Slide marked "Langenhan 6.35". Manufactured between 1921 and 1936.