First of Colt automatic pistols. Actually a developmental model, with only 3,500 being produced. Model 1900 was not really a successful design. Quite clumsy and out of balance in the hand, however, it was reliable in function during Army trials. Chambered for .38 rimless smokeless cartridge. A detachable magazine that holds seven cartridges. Barrel length 6". Finish blued, with case colored hammer and safety/sight combination. Grips are plain walnut, checkered walnut or hard rubber. Pistol is a Browning design and left side of slide stamped "Browning's Patent" with 1897 patent date. Colt sold 200 pistols to the Navy and 200 to the Army for field trials and evaluation. Remaining 3,300 were sold on the civilian market. Manufactured from 1900-1903. NOTE: Many of the original 1900 pistols had the original sight/safety converted to Model 1902 configuration. These are worth about 50 percent less than unconverted pistols.