Made in Germany? Available in 35mm and 8mm? No T-grain emulsion? Emulsion not made by Fotoimpex inhouse? 100 ASA? Triacetete base?
Guys, it's so obvious. I would bet any money that it is Orwo UN54. The only remaining German film manufacturer is Filmotec, successor of the East German Orwo company. They produce black and white film for movies.
This is good news because it is a very good film. I saw results that were pretty impressive, even in good ol' Rodinal. I never tried it myself because it has only been available in rolls of 100' and more, and I just don't like to roll my own films, but I look forward to trying it as soon as it's available.