The Model 1900 is a very significant and historic pistol as it was Colt's first production and John M. Browning's first fully successful semi-automatic pistol design. Colt only producing 3,500 of these pistols from 1900 to 1903 and as noted this example has a very early "three digit" serial number "727" placing production in 1901. This example has was returned to the Colt factory and had the later conversion applied to the rear sight/safety. It now has a fixed rear sight. The slide is marked with the early two line/two block Colt factory patent and address markings of: "BROWNINGS PATENT'S"/PAT.'D APRIL 20.1897" followed by "COLT'S PATENT FIRE ARMS MFG. CO./HARTFORD. CONN. U.S.A." The rear side of the slide has nineteen factory recut serrations followed by the encircled Rampant Colt logo. The serial number "727" is stamped on the left side of the frame above the trigger. The right side of the slide is marked "AUTOMATIC COLT/CALIBRE 38 RIMLESS SMOKELESS" ahead of the ejection port. The pistol had the Colt high polished commercial blue finish with niter blue barrel and trigger, casehardened rear sight and hammer. It is fitted with the later pattern brown, hard rubber grip panels with silver escutcheons on the sides, fitted niter blue screws. It comes with an original, nickel plated magazine marked "PAT'D SEPT. 9. 1884" on the bottom of the floor plate.