Manufactured in 1900, the first year of production for Colt's first commercially available semi-automatic pistol. The included factory letter confirms the configuration as well as shipment to Simmons Hardware Company of St. Louis, Missouri on July 17, 1900 as part of a 10 gun shipment. The left side of the slide is marked with the standard two-line, two-block patent date and address, with the circled Rampant Colt at the rear, and the right side of the slide has the standard two-line caliber marking. The early serial number "425" is marked on the left of the frame and underside of the slide. The sight features the early pattern plunge-milled slide serrations at the rear, seen on pistols only below approximately serial numbers 1400-1500. It is fitted with blade front and notch rear sight safety in the original configuration, smooth walnut grips which were standard until approximately serial number 2449, and a correct early nickeled magazine with "PAT'D SEPT.9.1884" on the base.

Very good, retains 30% original high polish blue finish with smooth brown and gray patina on the balance with scattered freckling, and defined markings overall. Grips are also very good with some scratches and dents. Mechanically functions fine, although sight safety retention spring is weak. A desirable first year production three-digit serial number Colt Model 1900 in "sight safety" configuration that is missing from many Colt auto collections!