.357 Magnum. 4" barrel length. SN: 51K4216. Nickel plated finish overall with casehardened hammer and trigger mounting Smith & Wesson medallion checkered Goncalo Alves grips. Double action hand ejector six-shot revolver mounting adjustable rear notch and matted front ramp sights atop a matted barrel rib. Revolver features a pinned barrel on a three screw frame with recessed cylinder. Standard make and model markings overall, including the Smith & Wesson trade mark to the right sideplate and four-line address to frame.