Thanks for the pics and the corrected serial number. The serial number is K119763. The K is part of the number. The space is a leftover accouterment from the days of swivel holes. That eventually went away.
This is an early .38 Combat Masterpiece. I think the guys have already given you a good probable date. It is not stainless (those did not show up until 1965). Your CM has a nickel finish and it may not be original. The hammer and trigger appear to be plated and the sideplate fit does not look right to me. If it has been refinished, it does not rate a 99% grade, since there is zero original finish left on the gun. That does not stop it from being a fine old piece though, and the family connection makes it priceless!
It does not have a target trigger. Instead, it has an add-on trigger shoe.
The target stocks are nice, but I don't think they are original either. The football relief showed up several years later than the age of your Combat Masterpiece, IIRC.