Digging through my grandfather's attic and came across these 3 bayonets. He doesn't remember where they came from so we have no idea what the story is behind them. Just curious if anyone knows what exactly they are. I would also be interested to find an approximate value.

The first (pictures 1,2,3) has a stamp on both sides at the base of the blade. One side reads "US 261396" and the other side is stamped "RIA 1917".

The second (pictures 4&5) has one stamp at the base of the blade that reads "AFH US".

The third (pictures 6&7) has no markings on the blade, but a stamp on the wooden handle that reads "148".

I have no idea how to go about identifying them, so I appreciate any input that you can provide. Thanks in advance!
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