Your revolver was one of a very short run and is documented in the Standard Catalog of Smith & Wesson.
It is, in my opinion, one of the very best compilations of size, barrel length, finish, and in a caliber suitable for defense. What commonly goes unnoticed is the S&W logo on both sides of the frame along with the excellent finished frame unlike the more recent ones with flaking issues.
I refrain from shooting anything other than standard pressure .38 Special loads (Winchester Defense) as there has been too many reports of aluminum frame revolvers splitting just under the barrel. (If you examine yours carefully in that area, you will see the frame is very thin there).
With that said, they are wonderful shooting revolvers and like you, mine has a permanent home.