German (Prussian) M 1871 bayonet by GEBR. WEYERSBERG-SOLINGEN. Unit marked. (ABCN129)(K366)(JN78-1)

Mauser M71 rifle/Mauser M71/84 rifle / Werder M1869 Rifle. Excellent- bright finished fullered blade with some patches of light pitting to the blade only. German makers name and residence: GEBR. WEYERSBERG-SOLINGEN on the ricasso. Blade spine is crisp Prussian marked and dated: Crown over W  over '73 over a  German inspection marking. Excellent brass grip with external spring. Pommel with a single German Inspection markings. Excellent bright finished steel crossguard with quillon and muzzle ring. MRD 17,4 mm. Crossguard is unit marked: 28. R. 5. 170. (= 28 Infantry Regiment Von Goeben, 5th Batallion, rifle: 170. Home base: Ehrenbreidstein, Coblenz) There is a very crisp German inspection marking and a 4 on the crossguard facing the blade.
No scabbard.