Not exactly an answer per se, but just for the record, S&W USED to be a major player in the L.E. & Military procurement circles, & as such produced many different configurations for many different agencies. IIRC, the old 357 Mag. M-65's w/ 4" H.B. were produced at the behest of the Oklahoma Highway Patrol / or State Police, can't recall which at the moment. [ IIRC, initially originated from the .38 Spl. M10 / 64 series. ] They ( S&W ) would pretty much make any configuration the purchaser wished if They order enough to make it financially worthwhile. I recall back in the late 1970's & 1980's when I was actively buying whatever I could afford. Remember, prior to the big 'auto pistol', then 'wonder 9' craze, the revolver was king ! Perhaps someday Roy Jinks will talk S&W management to load all their production data onto CD's for us to drool over.

Best, dpast32