I have this bayonet, which came from my grandfather. I don't know how he got it or where. I think it might be French, but not sure.
Any help on the vital info would be greatly appreciated. Pictures attached for your viewing pleasure. Bayonet blade is four-sided.
Looks like it has the following engraved on it:
On the curved part just below the blade: K59809
On the metal scabbard: (possibly) T R 20443, and just above that a P inside a circle.