The accompanying factory letter lists this revolver with a 7 1/2 inch barrel in .455 caliber, blue finish and wood stocks when shipped to Colt's London Agency on June 3, 1891, as part of a 20 gun shipment. Colt manufactured only 1,150 SAA revolvers chambered in .455 Eley. The top of the barrel is marked "COLT'S PT. F. A. MFG. CO. HARTFORD. CT. U.S.A. DEPOT 14. PALL MALL LONDON," the left side of the barrel is marked "455 CAL," the left side of the frame is marked with the two-line patent dates information along with a circled Rampant Colt, and British proofs are marked on the cylinder between each chamber towards the rear. A lanyard ring is mounted on the butt. The revolver has a full blue finish. Matching numbers on the frame, trigger guard and back strap. A small "K" is marked below the back strap serial number. Comes with a contemporary hardwood case holding six Remington-UMC .455 Eley II cartridges in a cartridge block.