Hi, this is my first post, so I'm sorry if this isn't quite right subreddit for this. I'm also going to post this to r/whatisthisthing, but I thought that a historical weapon might generate more interest here.
So this was found when my family and I were helping an older relative clean out her house in order to prepare it for repairs and renovation. It's a weapon with a leaf blade that looks quite a bit like a bayonet, including the manufacturer's mark on the ricasso, which says "S.A." and has a bomb underneath, and "1911" under that, which I know is all consistent with American bayonet manufacturers of the time. The other side of the blade is printed with "U.S.", and underneath is a four-digit ID or serial number that looks like "4223" (the 4 is rather worn and hard to see in the photo). The only thing is, I've never heard of a leaf-bladed American bayonet model being produced, and the cross-guard doesn't have the customary hole to accommodate the barrel of a gun, but it does have what appears to be the release button built into the handle. I was just wondering if anyone could help identify it for us?
Oh yeah...
Nice Hospital Corps Bolo knife As the article mentions, they were used for clearing brush and cutting poles and the like when setting up hospital encampments. They turn out now and then, and are generally nice knives. Congrats on your find there!
It's a U.S. Army Model 1910 bolo knife. Source, pg. 382.