Gary, it may have very well received two refinishes at Smith & Wesson. But my observation is that whenever the last finish was done on it, it wasn't by the factory. The polishing is too rough and overdone and frankly it doesn't look very professional. The stamp is R-S which I believe stands for "refinish standard." If I remember correctly, that was for a brush blue finish and R-B or a large B was for a bright finish.
Guy
Guy