Manufactured in 1906, this is an exceptionally fine example of one of only 6,210 Colt "Military Model of 1905" pistols manufactured over a period of six years. These pistols are a very important evolutionary step in the development of Colt automatic pistols and the Model 1911 as they were the first production Colt automatic chambered for the legendary .45 ACP cartridge. The included factory letter confirms the current configuration, grips not listed, as well as shipment to W.S. Brown in Pittsburgh, Pennsylvania on 5 April 1910. The left side of the slide is marked with the two-line, two-block patent dates and address, with the circled Rampant Colt behind the serrations. The right side of the slide is marked "AUTOMATIC COLT/CALIBRE 45 RIMLESS SMOKELESS". The left side of the frame is marked with the serial number, and the left of the trigger guard has a "VP" proof and "W". It has rounded blade front and rounded top notch rear sights, and the checkered spur hammer. It is fitted with a pair of diamond pattern checkered grips, an unmarked full blue magazine, and a smooth back strap not cut for a shoulder stock.