I mean this more as an observation and hypothesis than any sort of criticism or accusation, but something just occured to me: Given the almost overwhelming proliferation of S&W semi-autos in TV and movies during this period, what do you think the chances are that S&W "greased the wheels'',so to speak? It's not at all far-fetched.....or unprecedented.
We know the cigarette companies were actively pushing their products in the movies of the mid 20th century, and later, it became an open buisness to have products and their logos prominently featured in movies and TV.
Producers could have easily used any number of pistol facsimiles in their productions, yet the 39/59 designs have been more than proportionately cast. The odds of this being mere coincidence would be very slim, IMO.