Manufactured between 1955 and 1962 with a futuristic, space age design that utilized a cast aluminum frame in lieu of the standard steel frames of the day. It was a straight blow-back design that used a round bolt inside the upper part of the frame with exposed cocking knobs on the rear of the frame and an exposed hammer. With fixed front and rear sights and standard markings. Includes the original Whitney box hand numbered to the gun, period information booklet, manual, and warranty card.