The Butterfield Revolvers were manufactured by Jesse Butterfield of Philadelphia, Pennsylvania, in 1862. They are considered by collectors to be secondary U.S. martial handgun since they were manufactured in anticipation of an unrealized government contract. Because no contract was awarded, production was limited to only about 640 revolvers. It is equipped with a special disc priming device loaded by loosening a thumb-screw in front of the trigger guard. The top strap is marked "BUTTERFIELD'S/PATENT DEC 11. 1855/PHILADA". Various components are marked with the matching serial number "529" including on the bottom surface of both grip panels.

Good with the brass showing an attractive age darkened golden patina, defined top strap markings, some traces of original silver finish in protected areas, and extensive moderate pitting on the iron surfaces. The grips are very good with scattered scratches and dents, reglued sections on the bottom front edge of each panel, and light edge wear. The disc priming device is separated/broken in half; otherwise, the gun is mechanically fine.