Manufactured in 1937. Blade front and adjustable notch rear sights, with the two line address/patent markings and the Rampant Colt on the left side of the slide and "COLT <ACE> .22 LONG/RIFLE" on the right. The trigger guard is marked "60" and "X/VP", with a wide checkered hammer, short milled trigger, long grip safety, arched checkered mainspring housing and two-tone magazine.