Mauser C78, The six round grooved cylinder provides the nicname 'Zig-Zag.

Mauser C78, The Mauser C78 zig-zag was a single-action revolver manufactured by Mauser during the late 19th century. The “1st model” C78s were solid frame guns, but shortly after their introduction, the vastly improved hinged frame “2nd models” came out. 6mm Caliber. Matching serial numbers (93). 6mm black powder caliber is described here together with associated historical documents from the Paul Mauser Archive and with it's unique experimental ammunition and dismounting tool. 3 5/8 inch barrel. Fine markings. Excellent action and good bore with good rifling. 6x24R, and continued to manufacture them until 1884. Eventually in 1883, a committee designed ’ Commission Revolver ’ was chosen, which was a wholly uninspired design when compared to Mauser’s C78. k9u2smm, qoyne, z1boy, evxie, kpk, ofbk4, zl6, 8ssgp, fnp, kcam,