I have acquired some rolls of 120 B&W film that comes in a green packaging with silver lettering. It says ; 120 Black and White safety film; Made in Germany. Once opened, on the film backing paper tag [white] it says Panchromatic film, Made in Germany. On the backing paper itself which is beige it has the usual START but also ANFANO. Has anyone any idea what this stuff is and what the ISO is please?