Manufactured in 1889 and chambered in .476 Eley. Also known as the Enfield Mark III Ball cartridge, the .476 was introduced in 1881 and phased out in 1887 but continued to be produced at the Woolrich Arsenal until March 1893 and the Dum Dum ammunition factory in India until 1918. The first .476 Model 1878 revolver was shipped to the London Agency on June 26, 1884, according to the late Don Wilkerson in "Colt's Double-Action Revolver: Model of 1878", and the last was shipped on October 24, 1898. Wilkerson found only 2,458 revolvers were shipped in this caliber. The top of the barrel is marked "COLTS PT FA MFG Co HARTFORD CT. U.S.A. DEPOT 14 PALL MALL LONDON," "476 CAL" marked on the left of the barrel and trigger guard, lanyard ring on the butt and London proofs are present. Includes British Firearms Act of 1920 World War I War Trophy document dated January 12th, 1920 to Albert J. Holbourn of Gloucester Collage, Oscar Rd, Broadstairs (England), which indicates this was kept by Holbourn as a trophy of the First World War. A photograph of Holbourn in a sailor's uniform and obituary are included. He was the son of a shipbuilder and entered the Royal Navy in 1887 and retired as a petty officer and joined the Coast Guard Service where he remained through World War I. Includes wood case containing a Colt London label inside with a handwritten name that appears to read "R.H. Griffins", two oil bottles and brass shim.

Very good, retaining traces of original blue finish evenly flaking to a brown on the barrel with a decent amount showing on the side of the ejector rod housing, 20% original blue finish on the frame and cylinder flaking to a brown. Grips are very good with brown patina and sharp checkering. Wood case good, exhibiting some handling marks and a loose semi-detached bottom with fine red felt lining for the age and a Colt London sticker inside the lid. Mechanically functions fine.