Manufactured in 1945, blade front sight and adjustable rear sights, with the long two-line address and patent markings on the left side and "COLT SERVICE/MODEL .22 LONG/RIFLE" on the right. "JSB" (John S. Begley) inspected frame, with "UNITED STATES PROPERTY" above the serial number. Checkered thin hammer, stamped trigger, and thumb safety, long grip safety, serrated slide catch and arched mainspring housing. With reinforced Coltwood grips and full blue service model magazine.