German (Bavarian) M 1871 bayonet. Unit marking. (ABCN129)(K366)(JN78-1)

Mauser M71 rifle/Mauser M71/84 rifle / Werder M1869 Rifle. Serial number: 73113 on the right side of the crossguard. Excellent- bright finished fullered blade with some stains and peppering only.
Unusual: no makers name, no date nor inspection markings. Excellent brass grip with a blued external spring. Excellent bright finished steel crossguard with a quillon and muzzle ring. MRD 17,4 mm. Left crossguard is Bavarian unit marked:  B. 19. R. 1. 104. (= 19th. Royal Bavarian Infantry regiment King Victor Emanuel III of Italy. Home base: Erlangen. First battalion. Rifle No. 104.) 
No scabbard.

This piece is interesting that yes, is has a serial number (unusual!), but no makers name on the ricasso, no Cypher and date on the blade spine and not a single inspection marking on the hilt at all! These are not taken out.