Tonight, to my wonderment, I stumbled across what seems to be an otherwise forgotten Jess Franco screen credit. After watching an old VHS tape tonight, I discovered that the remainder of the tape contained the first 45-50 minutes or so of Marcel Ophuls' HAGAN JUEGO, SENORAS (1965; US: FIRE AT WILL), an Eddie Constantine thriller produced by Henri Baum, who also produced THE DIABOLICAL DR Z around this time. Jesús Franco is given an entire screen credit all to himself for writing the story and Spanish dialogues.
I remember Franco
saying in an interview that he had been responsible for dubbing a number
of Eddie Constantine films into Spanish in the 1950s, but this came much later, and it has generally been assumed that Franco stopped accepting work-for-hire jobs like this by this point in his directorial career. I don't
recall seeing this film appear in any of his filmographies, not in
books and certainly not on the IMDb. Now I wish I had the full feature! In fact, I do
have the French version of this film in its entirety, but of course its
credits make no mention of Franco. It would seem accurate, though, to credit him with writing the story (generally credited to Jacques Robert), as it's supposed to feature an all-girl gang led by a gypsy named Soledad! Franco had previously cast Soledad Miranda in her film debut LA REINA DEL TABARIN (1960) and, by this time, he may have taken notice that she was starting to play more prominent roles in films.