Rare original, early first model 1873,  Complete Lock and Hammer in excellent condition. This style dated lock and checkered hammer were used on the early production carbines and rifles. It will fit and function perfect on any Springfield 45-70 Trapdoor. The eagle, Springfield and 1873 date are stamped deep and clear. The firing pin striking surface of the hammer is in excellent slightly use condition.  The notches on the tumbler and the tip of the sear are in perfect condition. A complete early Model 1873 lock in this condition is difficult to find. This Lock will fit & function in all Models including 1873, 1877, 1878, 1879, 1884, 1888 Springfield Carbines, Rifles and Cadets.