Model 1858 double action percussion revolver manufactured by Starr Arms Co. c. 1862. The revolver has a high polish blue finish on the barrel, frame, six-shot cylinder, and trigger guard. The loading lever and hammer have a color casehardened finish. The one-piece walnut grip is oil finished. The round barrel has a dovetail mounted half-moon front sight. A groove in the hammer serves as the rear sight. The right side of the frame is roll-stamped "STARR'S PATENT JAN 15. 1856.," and the left side of the frame is roll-stamped "STARR ARMS Co. NEW.YORK". The serial number "8650" is stamped on the front of the frame, side of the cylinder and inside of the hammer well. All of the serial numbers match. "H" and "W" Ordnance sub-inspection marks are stamped on the barrel, cylinder, side plate, and trigger guard. An Ordnance final inspection mark that consists of four script initials inside an oval border is stamped on the lower left side of the grip, and a sub-inspection mark of consisting of the script initials "BH" in a rectangle with rounded ends is stamped on the lower right side of the grip. The Starr Arms Co. delivered 16,100 Model 1858 DA revolvers to the Ordnance Department between January 1862 and May 1863.