44 Caliber made by the Starr Arms company. One of 25000 purchased by the military for use in the Civil War. The inspector’s cartouche remains clearly visible on the right grip. Tjhisd design was an improvement to the double action of 1858. It was the third most major model purchased by the U.S. government during the war after Colt and Remington. 6 Short round cylinder and 8 inch barrel.