Thank you.1953-54
Cool old M&P. Not sure if Injunbro is looking at the wrong table, or if I am but I get more like 1945-46 for that revolver. The S prefix M&P's were done by 1948 I believe. It is the predecessor of the S&W model 10. You can clean up any rust with oiled copper wool. Make sure its all copper and not just plated with copper