Manufactured in 1918 and likely included in a nonconsecutive serialized shipment of 4,200 pistols (serial numbers 305,617 to 309,663) sent to the U.S. Springfield Armory in Massachusetts on May 23, 1918, as listed on page 520 of "U.S. Military Automatic Pistols 1894-1920" by Meadows. Features fixed oval blade front and notch rear sights, blued barrel with "P" and "H" marked on top along with "5" on the underside, checkered slide stop, thumb safety, magazine release, and wide spur hammer, short grip safety, smooth long trigger, and straight mainspring housing with a lanyard loop on the base. The slide bears the two-line, two-block patent date and manufacturer address on the left with the Rampant Colt in the center, along with model and U.S. Army nomenclature on the right side, and "H" marked at the top of the hammer recess. The left side of the frame bear the U.S. property marking and circled "eagle head/S8" inspection mark, with serial number on the right side. Fitted with a pair of "double-diamond" pattern checkered walnut grips and unmarked two-tone magazine.