Manufactured in 1854 and later returned to the Colt factory to receiver the Richards-Mason conversion, which removed the loading lever, partially filled in the lug cutout for the lever, bored the cylinder clean through, mounted a rimfire striker on the hammer, and ground down the recoil shield to accept a breech plate. Silver plated brass bead front sight on barrel with one line block letter New York address on top and the ejector rod mounted on the lower right side. The cylinder is roll engraved with the Texas/Mexico naval scene and stamped "COLTS PATENT No. 27880", the three screw frame is marked "-PAT. JULY.25.1871-/-PAT. JULY.2. 1872-", on the left side with "COLTS/PATENT" underneath, and the loading gate is marked "7880". Matching numbers. The revolver has no military inspection but has the military style factory blue finish with less polish. One can draw their own conclusion.