Manufactured in 1879, the second year of production. The barrel has the scarce "COLT'S PT. F.A. MFG Co HARTFORD CT. U.S.A. DEPOT 14 PALL MALL LONDON" address and is chambered in .450 Boxer. The trigger guard is marked "45 CAL/B." London proofs are stamped on the underside of the barrel and behind each cylinder flute. Includes a partitioned hardwood case with a Colt London paper label on the interior of the lid and contains an cartridge block, cleaning rod, oiler, and tool.

Very good, retains 60% plus of the original blue finish on the frame assembly and barrel with the balance having thinned to mostly a smooth grey patina, primarily on the grip straps, ejector housing, and right of the frame. The rechambered replacement cylinder is refinished with most remaining. The grips are very fine with some scattered minor dings and otherwise crisp checkering. Mechanically excellent. The case is very good with some scattered light handling/storage marks.