Unknown Military Socket Bayonet Musket Unidentified #5673 For Sale

Unidentified Unknown Military Socket Bayonet measuring 21.5" overall with a triangular blade length of 18.5", the inside diameter of socket is .800". Top of socket end is stamped with numbers, 5673. Shows a dark age patina, with scattered, pitting. An interesting piece that is similar to the Spanish Rolling Block Bayonet of 1871 and also the Belgium Pattern. If you have any further information on this piece, let us know. See photos.