Thank you, again. I'm very happy with the information that's been provided to me on this forum; I don't feel the need to get a letter from S&W on this (rather) modern handgun as there's no original shipping or other history I'm particularly looking to learn about this revolver. Yes, the s/n is both on the frame near the cylinder yoke (which is where I've been looking at it) and on the butt of the gun. However the butt is "hidden" by a pair of Pachmayr presentation grips that won't come apart! Perhaps someone before me once upon a time used Loctite on the screw and receiver that hold the left and right grips together, but I can separate the base joint apart just enough to see that there's a s/n imprinted there, as well. (I did receive and have the original S&W grips, too, when I acquired the gun.) Any suggestions as to how to get the Pachmayr grips to come apart without damaging anything? Knowing that it was originally made/shipped in 1978/1979 will be good enough for me. Thanks, again, for all your help and patience with me here.