I've got a 1949 Colt .38 Super that looks like it may have an Ithaca hammer. 5 serrations and finished on both sides. It is not parkerized. The finish matches the rest of the pistol and looks like its been with the pistol for a long time as in matching patina. Is that possible? I know Colt used some leftover WW2 parts until 1948, but this is a 1949. Thanks in advance.