It was 1915 when Heinrich Boker & Co. Solingen received the government order to develop a compact fighting knife that would be especially useful for trench warfare. After 90 years, we are reproducing the original knife blade out of high carbon steel with 0.75% carbon. The pronounced steel cross guard, the stag forearm handle, (designed for a firm and safe grip). On the back of the blade, each knife shows its serial number, this one is 5164. Excellent condition.