M1889/18 Bayonet - No Serial Number
Swiss model 1889/18 bayonet with scabbard, typically issued with 1896/11 Rifle and K11 carbine. Non-serialized.
This bayonet is not able to be attached to a rifle as the bayonet lug release has been disabled. The handle groove would also have been filled in with a wood block, but it appears the wood block was removed.