.45 ACP. 6.5" pinned matted and grooved ribbed barrel. SN: S159633. Blued finish, color casehardened hammer and trigger, checkered hardwood Smith & Wesson medallion grips. Double action swing out cylinder five-screw frame revolver with pinned barrel, six-chambered fluted cylinder, adjustable rear sight, ramped semi-Patridge front sight, .5" wide checkered hammer spur and .5" wide grooved trigger. Right of barrel marked 45 CAL MODEL of 1955. Matching serial numbers on frame, rear face of cylinder and in ejector rod cut out. Matching mating number 74854 in frame and on crane.