Just acquired this 38 Colt from my mother-in-law. She does not know anything about the Colt as it once belonged to my father-in-law's uncle. My mother-in-law said it was in pieces when they received the revolver and that my father-in-law sent it out to be blued and reassembled. It is now in perfect condition with leather holster. The story goes that the uncle used it in the 1920s. While examining the revolver, I found out that it had a patent of 1871 and below that July 2, 1972 and January 1975. The serial number is 282794. My question is: when he sent this in to be reassembled, did they engrave this patents on or are they the original engraving? Can anyone tell me how far this revolver goes back by serial number?