Does "original" mean an antique lock, or perhaps a more modern hand-made lock? It looks like a good quality lock, but a couple of details on it suggest a newer lock, such as the top jaw screw with its flat bottom end and machine marks on the top ball, and the cock screw holding the cock in place with what appears to be a straight, machine cut, flat bottomed slot. If it is an original antique lock from ca. 1800, it has survived in remarkable condition. Shelby Gallien