Mystery film?

Hello all!

I have a problem, I got given a bunch of 35mm films by a friend. All different kinds and brands, efke, ilford, kodak, even agfa. Moste of them though were blank black casings only wrapped in tinfoil. I've been asking around and researching with little results. All i got is some letters on it. they read (if i can deciver right) "wxk" "wx3" and "21". the w could be an m as well though. I am a bit lost. Has anyone come across film like that before? The only film i could find similar to this is Tasma NK-2, am not sure though if it is. I added some photos of the casing.
I'd appreciate your help!

Best regards, Simone

All the wrapped films look the same?
Determine development time with clip test, shoot at 100 and develop some. There is chance to find some markings on the edges.

The 21 might be a DIN film-speed number??

And DIN 21 is equal to ISO100 fwiw.

IAUTI Russian 35mm film came wrapped in foil and wan't loaded in a cassette - that was something the photographer was expected to do, using his own cassettes. In that scenario it appears as Russian film would appear.

Russian/Soviet film was packaged in variety of ways: in cassettes, on the spool without cassette in the foil and just film wrapped in the foil.

You could process an unexposed clip and see if it has some edge printing.

Ilford was giving away free rolls of film in their 100 page paper packs a while back.

Could it be Negra 21 film from Spain? In the early 1970s Ilford b&w film was sold in overseas markets on a spool and in foil but without the cassette. I bought some when I was a teenager. At the time I didn't have a changing bag with me so I used my coat to remove the foil and get the spool into the cassette. The old Ilford and Agfa cassettes were great for reloading.

emily.voigtlander said:

Ilford was giving away free rolls of film in their 100 page paper packs a while back.

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The picture reminds me very much of Polypan F an Ilford movie print film ISO 50 - but take it from there with developers etc. Double with diafine and FX-2 I find.
Hey! It's free so do the test to see the edge and try out some standard exposures. Sunny 16 stuff. You can even play with Caffeineol once you get it half sorted
Murray