Colt London Navy, .36 cal. single action percussion revolver.  Serial #41770, mfg. Colt London, 1857.  Antique. Second Model. Good condition.  7” octagonal barrel has crisp Colt address marking.  Barrel, cylinder and frame have little remaining finish and appear to have been touched up with cold blue.  Bore is dark. All matching serial numbers on barrel, frame and grip with British proof marks in correct places.  Grips are worn and have a chunk missing on left side.  Single action works fine – gun is completely functional.  A rare variation of the famous Navy Colt!  Antique, can ship to your door.