This is an original in excellent condition. This Extractors was designed for the Model 1873 Custer, early Narrow Receiver, pre 96,000 serial number. The top of thee return stud is shorter than the next model extractor. It will fit and function perfect in any Springfield 45-70 Trapdoor. If you are a shooter they are a necessity to have as a spare. Springfield Extractor for Model 1873-1889 45-70 Trapdoor. They will fit all Models including 1873, 1877, 1878, 1879, 1884, 1888 Springfield Carbines, Rifles and Cadets Use Hinge Pin (ORI-339A) to mount these extractors into your receiver