https://www.facebook.com/share/p/1PRHQxNpKa/ I am having a time figuring out any information on this one, my grandfather had it in his collection. He was in WW2 so there is a possibility he brought it back with him, but I know it is not military since all those I have found in research have knuckle guards...For reference the blade is 6 inches in length, and total length is ten inches (minus the crusher tip) any help would be greatly appreciated!