Only around 1,000 of these 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. "364" is marked on the recoil shield, rear of the frame, underside of the back strap, and front face of the grip. "709" is marked on the top strap lug.

Fine, retaining 90% period retailer applied nickel finish with some patches of flaking at the edges and around the nipples on the cylinder, and defined markings in the metal. The barrel latch button is replaced. Grip is fine with scattered light scratches and dings, and numerous minor chips at the bottom edges. Mechanically fine. This attractive high condition example of a scarce Wesson & Leavitt revolver would make a fine addition to any antique American arms collection!