Only approximately 1,000 of the Wesson & Leavitt Belt Model revolvers were manufactured by the Massachusetts Arms Co. in 1850 and 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. In addition to the standard markings and cylinder etching, the revolver has high quality floral scroll engraving on the frame, lock, and hammer and a silver plated trigger guard and grip straps. "204" marked on the back of the barrel "barb" and face of the arbor pin. "253" marked on the front surface of the frame behind the cylinder. Includes a Wesson & Leavitt pocket sized powder flask and a Mass Arms Co. brass .31 caliber ball/bullet mold with sprue cutter.