German M 1871 NCO sawback bayonet by COULEAUX & C0. -KLINGENTHAL. Unit marked. (ABCN1230-1)(K367)(JN78-2)

German Mauser M 1871 rifle, M1871/74 and M 1888 Commission rifle. Very good+ bright finished fullered sawback blade with patches of light pitting spread over the blade. Sawback with 48 teeth. German (Elzac) maker's name; COULEAUX & Co.-KLINGENTHAL in three lines faint on the ricasso. 
Excellent brass grip with oblique grooves on the right side, secured to the blade tang by a steel rivet. The left side is plain. Blued and pitted external spring secured by a steel screw. Excellent bright finished steel crossguard with muzzle ring MRD 17,5 mm. Large German Inspection mark on the crossguard towards the blade. Finial on top of the muzzle ring and a back swept quillon. German unit marking on the left side of the crossguard: 97. R. 10. 144. (=  97. Oberrheinisches Infanterie-Regiment, 10th Bataillon,  Rifle number 144, Home base: Saarburg,)
No scabbard.

The M 1871 sawback bayonet was mainly issued to infantry NCO's and that was ca. 6% only of the German army.
A very rare and very impressive bayonet in a fair condition.