1991 Expired Fujicolor Super HR 100

I was wondering what might be the black spots in the photo along the bottom. I've seen them in other photos from this roll. Some color cast and definitely needs to be shot at most iso 50--this was box speed. This is Fujicolor Super HR 100 126 film. Shot in a Rollei A26.

This was 126 film? Those are probably spots where humidity has leached sensitizers from the emulsion into the contacting backing paper.