Approximately 3,500 Joslyn Model 1862 carbines were made, 2,200 of which the U.S. Government purchased. The lock plate is marked "JOSLYN FIRE ARMS Co/STONINGTON/CONN.", and the breech block is marked with the 1861 and 1862 patent dates. Hook type breechblock latch, pinched blade front and three leaf rear sight graduated up to 500 yards. Serial number "3351" marked on the upper tang and underside of the barrel at the breech, and "1925" on the breech block. "F.D.L" inspection initials marked on the left breech of the barrel. Two boxed script inspection cartouches stamped on the left flat above the saddle bar.