It almost looks like reduction lathe marks that have not been polished off a master die. However, having said that, they seem to be in the wrong area. Reduction lathe marks are circular marks that appear to get smaller towards the center and your picture shows marks that are near the center, but are not small circles. Since you have found more than one in a roll, it is definitely die related and more than likely polishing marks.
WAVYSTEPS aka BJ Neff