Manufactured in 1881, this is an example of a highly sought after Colt Single Action Army Revolver that is chambered for the .44 Henry Rimfire cartridge. Only 1,863 Single Action Army revolvers were chambered in this caliber. The .44 rimfire series was introduced in 1875, and they were serial numbered in their own range from 1 to 1,863. Surviving examples are scarce. It has standard markings and matching serial numbers are on the frame, trigger guard, back strap, and barrel. The ejector housing assembly is a replacement. The included factory letter confirms the current configuration including the rare caliber (grips not listed), as well as shipment to Hartley & Graham in New York on 30 March 1881.