This original, Near mint condition, Complete Lock and Hammer will fit and function perfect on any Springfield 45-70 Trapdoor. The eagle and Springfield are stamped deep and clear. The firing pin striking surface of the hammer is in new condition. The tumbler and sear have the same inspector mark. The notches on the tumbler and the tip of the sear are in perfect condition. A complete lock in this condition is difficult to find. This Lock will fit all Models including 1873, 1877, 1878, 1879, 1884, 1888 Springfield Carbines, Rifles and Cadets.