Reportedly, 850 of these Dragoon revolvers were manufactured between 1850-1851 before production was halted due to a patent infringement suit won by Colt. The design was in part by Edwin Wesson, older brother of Daniel B. Wesson of later Smith & Wesson fame. The younger Wesson and Horace Smith were among the incorporators of the Massachusetts Arms Co. This nickel finished example has standard markings and features with a six-shot cylinder. "MASS. ARMS CO./CHICOPEE FALLS" marked on the top strap, "WESSON'S & LEAVITT'S PATENT" marked on the lock, "LEAVITTS PATENT APRIL 29. 1837" on the back of the cylinder, "WESSON'S PATENT AUG. 28. 1849" on the bevel gear. "412" marked on the back of the barrel "barb", "17" marked on the bottom of the barrel topstrap, recoil shield, rear of the frame, underside of the back strap, and front face of the grip. Scarce 6 1/4 inch barrel.