Howdy

Nice, typical four inch M&P. The most common revolver carried by policemen for much of the 20th Century. Also nice that it has the original grips on it. Lots of these older Smiths lose their original grips when unscrupulous dealers realize they are worth money. Notice that the SN on the underside of the barrel matches the number on the butt. You should also see the same number on the rear of the cylinder and the underside of the extractor star.