Approximately November 1874, per the chart in "A Study of the Colt Single Action Army Revolver" by Graham, Kopec, and Moore. Barrel with script address on top of barrel with flanking Maltese crosses and partial serial number under ejector rod housing, which has stud on interior of ejector rod housing with matching slot on barrel. Ejector rod with bullseye head. Rifling is thin six groove. Cylinder marked with matching serial number and what appears to be small bolt stops that have been exacerbated by use. Frame with 2 line patent information "PAT. SEPT. 19. 1871 / PAT. JULY. 2. 1872", "45 CAL" marking on rear of trigger guard. One-piece walnut grips. Matching serial numbers observed on frame, trigger guard, and butt. There are a plethora of "kill notches" on left side of barrel, four more on the left side of the butt, and a large "Yb" incised at top of left grip panel, with yet more notches. Accompanied by a pair of Colt factory letters indicating that no record of this revolver was found, and a handwritten inventory sheet describing this revolver, which notes that John Kopec reviewed the gun on February 3rd, 1996, and the Sahara Hotel during the Las Vegas Antique Arms show. CONDITION: Metal is essentially devoid of finish in all but the most protected areas, such as under ejector rod housing, and is now largely gunmetal grey mixing with areas of chocolate mossing. Grips with numerous bumps and bruises from use, with some chipping along bottom. Mechanically fine, bore is good with well defined rifling and mild frosting throughout. Barrel Length: 7 - 1/2" Caliber/Bore: .45 Colt FFL Status: Antique Manufacturer: Colt Model: SAA Paperwork: Factory Letter Serial Number: 15661