Mauser Zig-Zag Model 1878 9mm caliber revolver. Bore is excellent. Action works perfectly. This is the large frame Zig-Zag Named by collectors because the Zig-Zag feature of the cylinder rotated the cylinder upon cocking as it Rode on a stud that made the cylinder advance to the next chamber upon farcin pull of the hammer. Revolver has approximately 93-95% original blue. Original grips have excellent checkering. Grips have No chips or cracks. Action works perfectly. Cylinder has 95-97% of its Nitre or fire blue. This is a rare Mauser in very fine condition. And reasonable priced.