This Colt Thunderer Model 1877 DA revolver was manufactured in 1897. The revolver has a 4 1/2 inch barrel and the distinctive checkered, hard rubber, birdhead grips. The barrel, cylinder, trigger guard and backstrap have a high polish blue finish. The frame and loading gate are case-hardened. The trigger and top of the hammer are niter blue and the sides of the hammer are bright. The black, hard rubber grips, are finely checkered and have the Rampant Colt trademark in an oval in the upper corners. The top of the barrel is marked "COLT'S PT. F.A. MFG. Co/HARTFORD. CT. U.S.A." in two lines. The left side of the barrel is marked "COLT. D.A. 41". The left side of the frame is stamped with the 1871, "73 and "75 patent dates in a three-line format followed by the encircled Rampant Colt trademark. The serial number is located on the front of the frame, the trigger guard, and the backstrap. The partial serial number, "374" is stamped on the rear face of the cylinder.