Manufactured in 1864 for the union forces during the Civil War. The top of the barrel is marked "PATENTED SEPT. 14.1858/REMINGTON & SONS. ILION.NEWYORK. U.S.A /NEW MODEL". The matching serial number is marked on the underside of the barrel, the lower left side of the frame under the grip and written in pencil on the inside of each grip panel. There is a single letter "D" inspectors mark on the left rear barrel flat and on the trigger guard, "C" on the left front of the frame and on the loading lever, "R" on the cylinder,, upper right front of the frame and right rear barrel flat "W" on the left rear of the frame, a "P" on the rear cylinder face and an "S" on the underside of the barrel. Blue finish with niter blue trigger, casehardened hammer and brass trigger guard. Fitted with smooth two piece walnut grips with a sharp Ordnance inspector's script initials "RH" in a rectangle on the left panel and a "D" on the bottom of each panel. The Remington New Model Army Revolver was the primary handgun issued to Federal cavalry regiments during the last two years of the Civil War. These rugged revolvers remained in service with the regular cavalry regiments on the frontier until they were replaced with the Model 1873 Colt Cavalry revolvers circa 1875.