Manufactured in 1928. Fixed sights, with the two-line address and patent markings on the left side of the slide and "COLT AUTOMATIC/CALIBRE .45" on the right, along with the Rampant Colt. The frame is marked "1/VP" and "51" on the trigger guard, with a milled short trigger, checkered wide hammer, long grip safety, checkered slide stop, thumb safety and mainspring housing, and an unmarked two-tone magazine.