so you bought a M91 with a 91/30 bayonet? i'm guessing it would still be able to be fixed on the rifle but have you got a proper M91 bayo yet?
A 91/30 bayo will work on an M91. It's not period correct. Unless if it's a Finn. Then it doesn't matter whether it's a 91/30 bayonet or not. It's still correct.