I do believe that the Tasma 100 is a relatively new product becauseit is
packaged in DX coded cassettes. The dev time approximates to that as for Pan
F.
Retro Photographic in the UK markets the 64, the 100 and the 125ASA.
The 64 and 125 are possibly examples of their internal market stuff. The
film is wound onto a spindle but that spindle is then wrapped in black paper
as to be light-tight and then sealed in a foil bag. A Soviet or Russian
photographer might have reloadable metal cassettes like the Leica type which
have two cylinders, forming a light trap. The Soviet types have the light
trap opened when you close one of the latches on the base of the
camera.There are two different sorts for the Fed and the Zorki, the Zorki
type won't work in a Fed. The spools of the Tasma just slot into either
cassette.

Now the Tasma Foto company in Tartarstan are not the easiest to deal with,
they seem to still have the Soviet era ethos that the customer is always
wrong. I got the impression that Retro might not continue to deal in this
film after they have exhausted the considerable supply they obtained.

Who else deals in these films? Did Tasma make a higher speed film?