Dan,
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.
Jeff