Manufactured in 1900, the first year of production for Colt's first commercially available semi-automatic pistol. 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. The right side of the matching numbered slide has the standard two-line caliber marking and the serial number is marked on the left of the frame. 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 nickeled magazine with "Sept.9.1884" patent date on the base. The included factory letter confirms the configuration as well as shipment to Montgomery Ward & Co. in Chicago on 7 June 1900.

Fine, retains 50% of the untouched original high polish blue finish with extensive mild oxidation/pitting scattered throughout. The grips are also fine with some scattered minor handling marks. Mechanically excellent. A totally original, rare first year production two-digit serial number Colt Model 1900 in "sight safety" configuration that is missing from many Colt auto collections!