French M 1838 socket bayonet for the Rempart rifle / Grosse Carbine. (ABCN1153)(K353)(JN0)

French M 1838 Rempart rifle/ Grosse Carbine. Serial number on the socket rim : 237. Excellent- bright finished broad blade with a large false edge. There are a few small spots with light pitting only.  Left shank is marked with a French inspection marking: Star over B in an oval. Right side is marked : 8 . Socket with a unique halve locking ring devise. Very large MRD 28. 4 mm!. Diverse hard to read markings on the left side of the blade.
No scabbard was provided with this model.
Total length: 58.5 cm

These super rare socket bayonets could be issued with a very rare brass hilt insert to make it a sword. These additional hilts are seldom encountered and if, many are fakes.