Unmarked, maker unknown. Qualite or Brownells, maybe. Used with patina. Came off an OM .357 that I sold locally and the guy didn't want to pay extra for the brass, so I swapped on an aluminum XR3-RED. Weighs 10.7 oz., so will add about a half pound to your old model revolver. Hard to find these days. Leave the patina or polish it up and get some fancy grips for that nice old 3 screw shooter 8)
SPF $275 shipped/insured
SPF $275 shipped/insured