Armi San Marco 1858 “Rgt. Buffalo”, .44 cal. black powder single action revolver.  Serial #D20364, mfg. ASM, Italy.  Good condition.  12" octagonal barrel has very good bore with 90% blue finish.  Ramp front sight and adjustable rear.  Cylinder has 90% blue with index marks.  Brass frame and trigger guard have much spotting and black powder discoloration.   Wood grips are in good condition. Single action works fine.  Includes maker's two piece box.  Nice display piece.  Black powder, can ship to your door.