ww1/ww2 1917 1918 U.S knuckle knives

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Mine has stacked cannon balls and a letter M with an arrow going through it.

Its a type 30 Japanese bayonet it seems.
Guess that means it was ment to kneel down and fall on.
While I havent gone to that extent I have drawn blood scratching my back. Haha

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Very interesting!

I thought most Japanese bayos had a curved guard but there were some straight ones made later in the war. That pic totally looked like a M1917 when I saw but now that I'm able to compare it looks like that is the case.

Still a really cool piece of WWII history in great shape for age!