I picked up some 40+ yr old B&W 120 roll film. Mostly Kodak, Ver & Pan stuff.
There was a no-name roll, no mfg, name. Just ISO 125.
Since the other stuff was as far back as '72, this could have been older
Time to experiment. Put in in my Mamiya 7 & shot this no-name film at two stops over.
Stand developed in Rodinal.
your results are fantastic. But it is hard to make a definite statement. More of the backing paper might stir some old memories. (arrows or little hands at the start?),( dots or squares or something else between the numbers?)
Which country was the film from?
I have a vauge recollection of wavy lines like that on Ansco film, but don't think I ever got a chance to develop any ansco roll film myself.
Check out this thread on photo.net, which shows backing paper from a roll identified as "unmarked" Ansco film. That one happens to be 127 rather than 120, but it seems to have the same characteristic markings as yours right down to the wavy lines, black/silver color scheme, and pointing hands, all of which makes me think yours is most likely an ANSCO product. I'm not sure if I would go so far as to say it is ANSCO All-Weather film specifically though, simply because it isn't labeled as such. Then again, ANSCO no doubt manufactured similar films with more generic labeling, possibly even sold the same emulsions to be sold through no-name brands. So "some kind of 125 speed ANSCO" may be as close as you can get to an answer. For what it's worth, the All-Weather was a 125 speed film from what I've read.
Anyway, you might also check out this picture of an unidentified roll of 620 film, which also looks suspiciously like what you have.
some web foo brought up this like to an old TV ad for "all Weather pan" I suspect ALL Weather was a dual layer/sensitivity film like Verichrome pan, while Ansco Versipan was one speed like Plux-X..