Pre-war version of K-22 K-frame, 6-in. barreled revolver. Chambered for .22 Short, Long and Long Rifle. Walnut grips, adjustable rear sight, no ribbed barrel. Manufactured from 1931 to 1940. In 1940, name was changed to K-22 Masterpiece and an improved adjustable rear sight was added. S&W short action was another improvement., serial number range 632,124-682,419.