Manufactured in 1890. The barrel has the one-line Hartford address on top and "450 ELEY" on the left side. Per R.L. Wilson in "The Book of Colt Firearms" Colt manufactured 84 flattop target Single Action Army revolvers chambered in .450 Eley. London proofs are stamped on the underside of the barrel and in each cylinder flute, target sights, and matching serial numbers are on the frame, trigger guard, and back strap. The partitioned case features an added cartridge block for 31 rounds and currently holds 22 rounds of .450 Eley and a single round of .455 Eley. A Colt London paper label on the interior of the lid and containing an oiler, screwdriver, and cleaning rod.