This is an extremely rare and highly desirable example of an early 1912 production U.S. Military Contract, Colt U.S. Model 1911 Semi-Automatic Pistol with the early slide markings, nitre blue finish, early parts with the rare and very desirable small early serial number markings. This extraordinary Colt automatic is accompanied by a Colt factory letter dated Sept 2015, validating this pistol as "1 of 200" pistols shipped to the US Army. This early pistol was probably manufactured in February 1912 during the first full month of production and was shipped to the Commanding Officer of Springfield Armory on March 2, 1912. The pistol has the very rare lustrous high polish Colt commercial blue finish with the niter blue finish on the safety lock, slide stop, hammer, trigger, mainspring cap and barrel bushing. The high polish commercial finish was replaced by the military "dull blue finish" at approximately serial number 2,400 on April 24, 1912. The pistol is fitted with checkered walnut stocks and has the original thin stock screws used on early production guns. This beautiful pistol has the desirable, early two-line, two-block slide markings of "PATENTED APR.20.1897/SEPT.9.1902. DEC.19.1905. FEB.14.1911." followed by "COLT'S PT.F.A. MFG. CO./HARTFORD.CT.U.S.A.", with the encircled Rampant Colt trademark behind the slide serration. The right side of the slide is stamped with the early small stamped "MODEL OF 1911. U.S.ARMY". The front left side of the frame is stamped with the early small size "UNITED STATES PROPERTY", with the encircled "WPG" monogram of Ordnance Inspector Walter G. Penfield above the magazine release. The right side of the frame ahead of the trigger guard, is stamped with the very early and highly desirable, Type 1, small serial number markings of "No. 1171". This pistol is fitted with the correct various early features such as the short hammer with borderless checkering to the edge, the round top rear sight and the narrow front sight with the smaller stud on the underside, the early first type recoil spring guide with the bevel on the front edge and the lower rear points, an early first pattern recoil spring plug with no punch mark, the first pattern slide stop with fine checkering and no dimple on the backside, the original Type 1 magazine catch lock with concave head and the early thin thumb safety lever with the sharper edges and undercut on the back and underside of the thumb piece. It retains an all blue early style barrel, which carries no inspector proofs or markings which writer has seen on other examples but is most likely replaced. The rear face of the slide and the top of the receiver are correctly stamped with the small "H" provisional inspection mark of Frank L. Hosmer. The top of the frame is also stamped with a "3" Colt assembler's mark to the right of the disconnector hole. The pistol is fitted with an original early production (and extremely scarce) magazine that has the blued finish, with a temper line that is approximately 1 inch below the feed lips, with the exposed edge of the magazine base with the lanyard loop on the underside of the plate. The sides of the magazine body actually show the pin heads were actually ground down flush with the magazine body and the base plate. This is an almost impossible magazine to find today!