This is one of approximately 770 Standard Model Dragoon revolvers manufactured by the Massachusetts Arms Company of Chicopee Falls, Massachusetts, circa 1850-51. This example is without a loading lever. The top strap is marked with the two-line Chicopee Falls address. The lock plate is marked "WESSON'S & LEAVITT'S PATENT" and the bevel gear is stamped with the 1849 patent date. The serial number is stamped on the face of the recoil shield. The Wesson & Leavitt Dragoon revolver was a well made revolver that was one of Colt's first competitors. Samuel Colt successfully sued Massachusetts Arms for patent infringement in 1851. The injunction imposed, as a result of the lawsuit, led to abandonment of the Dragoon pattern and redesign of the Wesson & Leavitt revolvers.