Produced between 1858 and 1865 with approximately 1,500 manufactured. Marked "ALLEN & WHEELOCK. WORCESTER. MS. U.S. / ALLEN'S PAT'S. SEPT. 7. NOV. 9. 1858." on the left side barrel flat. The front sight is a brass cone and the rear is a v-notch in the top of the frame. The cylinder is 7/10" long, for the short rimfire cartridge, with the cylinder stops are at the front edge and roll engraved scenes of arms and western action. Checkered hammer and smooth spur trigger, with smooth walnut square butt grips. With a black leatherette case, featuring a blank inscription panel on the lid, red velvet lid lining, blue velvet compartment lining and a wood ejector rod.