This carbine is either a late production Model 1873 or an early production Model 1877. Fixed blade front and "C" marked adjustable Model 1877 carbine rear sight graduated to "12" on the ladder and from 1-6 on the left side of the base. There is a single "L" mark on top of the barrel at the breech. The breechblock is marked "MODEL/1873/eagle/U.S." and the lock plate is marked "U.S./SPRINGFIELD/1873" followed by the eagle and shield stamp. Checkered hammer with a three tumbler lock. Short carbine stock with a single barrel band, sling bar and ring on the left side, circled script "P" on the underside of the wrist, "SPF D69" marking on the left side of the butt, and a curved steel buttplate.