Smith & Wesson Governor, .45 Long Colt/.410 ga. double action revolver.  Serial #CRX5174.  3" barrel has an excellent bore, fixed sights.  99% dark blue finish with just a light index mark on the cylinder.   Action locks up well. 2 ½” chamber.  S&W rubber grips are excellent.  Big boy with lots of caliber/gauge versatility here.