I own the same model S&W, but mine carried serial number 40. It is also nickel plated. It was returned to the factory in 1920 and probably refinished since the finish is about 999%. The side plate has only three screws. The fourth screw must have been added later.

I was wonder what types of loads you used in your pistol? I have not fired mine, but would like to do so, and your posting encouraged me to pursue getting some ammunition.

__________________
Joseph L. Lyon