Sterile Vintage 13cm open German Automatic Coilspring Squeeze Knife early 20th century

Sterile Vintage 13cm open German Coilspring Squeeze Knife early 20th century all metal automatic knife most likely made before 1930. This interesting old knife measures 12.8cm (5 inches) open and 3 inches closed. The spear point blade appears to be full with original finish under some spotting and light pitting with no makers mark on the blade. The handles are smooth steel in good condition with patina. The knife works well with blade tip deep, good snap and held open only by light spring tension. You squeeze the bottom/back of the scales to open the knife. EX- condition