German M 1898/05 nA Saw-backed bayonet. Double maker marked, by J.H.BECKER-SOLINGEN & L.O.DIETRICH - ALTENBURG.(ABCN805-2-b)(K257)(JN86-2)

German Mauser M 1898 Rifle and Carbine. M98/05 saw-backed bayonet. Very good bright finished fullered "Butcher" saw-backed blade with German maker names: L. O. DIETRICH - ALTENBURG on the right ricasso and J. H. BECKER - SOLINGEN on the reverse side. 58 sharp teeth. Blade spine is crisp marked with a Gothic inspection marking, but no date nor a royal cypher. The blade shows a small spot of light pitting on one side. Excellent bright finished pommel, flash guard, crossguard and quillon. A single German inspection markings on the pommel. Excellent ribbed black walnut grips secured to the blade tang by screw bolts. Oil hole in grip. T-O slot in pommel.
Very good and correct blued steel scabbard with a single German inspection marking on the throat. There are no dents but it is very fine peppered.

Double maker marked German M 1898/05 saw-backed bayonets are not common! 
Little is recorded about the firm: J. H. Becker of Solingen. Bayonets with their trademark are rare and not one example has been dated. Their bayonets bear very few inspection stamps. They only made a small production run of saw-back blades in 1916 and early 1917.
Very little is known about the firm L. O. Dietrich & Companie- Altenburg- Thüringen and bayonets with their markings are undated and are quite rare.
It seems that Dietrich were employed in finishing the blade blanks.