- Late 1948 K-22 Masterpiece, 6", Serial Number K53679. This gun is in around 95% condition with a turn line and light muzzle wear. All numbers match EXCEPT for the stocks, but are period correct, sharp shoulder magnas. No buggered screws, front and rear sights are in great shape. A very nice example of an early 4-line address K-22. $750.00 shipped First "I'll take it" followed by PM gets it.