Bound by the Rollin White patent (#12,648, April 3, 1855) and not wanting to pay a royalty fee to Smith & Wesson, Colt could not begin development of bored-through revolver cylinders for metallic cartridge use until April 4, 1869.[5] For the design, Colt turned to two of its best engineers: William Mason and Charles Brinckerhoff Richards who had developed a number of revolvers and black powder conversions for the company. Their effort was designed for the United States government service revolver trials of 1872 by Colt's Patent Firearms Manufacturing Company and adopted as the standard military service revolver. Production began in 1873 with the Single Action Army model 1873, also referred to as the "New Model Army Metallic Cartridge Revolving Pistol". The very first production Single Action Army, serial number 1, thought lost for many years after its production, was found in a barn in Nashua, New Hampshire, in the early 1900s. This gun was chambered in .45 Colt, a centre fire design containing charges of up to 40 grains (2.6 g) of fine-grained black powder and a 255-grain (16.5 g) blunt round nosed bullet. Relative to period cartridges and most later handgun rounds, it was quite powerful in its full loading. The Colt Single Action Army revolver, along with the 1870 and 1875 Smith & Wesson Model 3 "Schofield" revolver, replaced the Colt 1860 Army Percussion revolver. The Colt quickly gained favour over the S&W and remained the primary U.S. military sidearm until 1892 when it was replaced by the .38 Long Colt caliber Colt Model 1892, a double-action revolver with swing-out cylinder. By the end of 1874, serial no. 16,000 was reached; 12,500 Colt Single Action Army revolvers chambered for the .45 Colt cartridge had entered service and the remaining revolvers were sold in the civilian market. First generation (1873–1941) Colt Sheriff's Model, 3-inch (7.6 cm) barrel Colt SAA SAPD, Badge The Single Action Army became available in standard barrel lengths of 4+3⁄4 inch, 5+1⁄2 inch, as well as the Cavalry standard, original 7+1⁄2 inch. The shorter barrelled revolvers are sometimes called the "Civilian" or "Gunfighter" model (4+3⁄4 inch) and the Artillery Model (5+1⁄2 inch). There was also a variant with a sub-4-inch barrel, without an ejector rod, unofficially called the "Sheriff's Model", "Banker's Special", or "Storekeeper". From 1875 until 1880 Colt marketed a single-action revolver chambered in .44 Henry in a separate number range from no. 1 to 1,863. A "Flattop Target Model" was listed in Colt's catalogs from 1890 to 1898. Colt manufactured 914 of these revolvers with a frame that was flat on top and fitted with an adjustable leaf rear sight. The front sight consisted of a base with an interchangeable blade. In 1896, at serial number 164,100, a spring-loaded base pin latch replaced the cylinder pin retaining screw and by 1900, at serial number 192,000, the Colt Single Action was certified for use with smokeless powder. In 1920, larger, highly visible sights replaced the original thin blade and notch. The revolvers remained essentially unchanged from that point until cessation of manufacture at the beginning of World War II. From 1873 through 1940 (with small numbers assembled during and after World War II, the so-called "Pre-War, Post-War" model), production of the Colt Single Action Army reached 357,859. This is identified as the "Pre War" or "First Generation" of the model. Calibers, at least thirty in all, ranged from .22 rimfire through .476 Eley, with approximately half, or 158,884 (including Bisley and Flat Top Target variations), chambered for .45 Colt. The next most prevalent were the .44-40 Winchester Center fire (WCF) at 71,392; 38-40 (38 WCF) at 50,520; .32-20 Winchester (32 WCF) at 43,284 and, the 41 Colt at 19,676.
This pistol is a completely restored revolver, I built this revolver from an original, antique, standard, 41 caliber black powder colt saa, with a new .357 barrel, new/old grips , new finishes, new cylinder and new configuration. The results are shown in the above pictures. Engraving by Brian Frank.
oldguns.ca, virtual museum collection.