Welcome to the S&W Forum, tv44engr.
You have a very nice, relatively early, K-22 Masterpiece. It most likely shipped from the factory in November or December 1948.
The finish appears to be in Excellent condition and the sharp shoulder Magna stocks are probably original to the gun. That style lasted only until 1952. If you look on the inside of the right-hand panel, you should find a stamped serial number that matches the one on the butt of the revolver.