[Abravefan11]

Steve - My point is that the flagship brands like Piedmont and Sweet Caporal (with the exception of SC649) were printed multiple times during a print groups production.

If every back had a one time printing with a set number of sheets, all of the numbers would work out. But that's not what happened and why the numbers and anomalies won't be consistent. The subject configuration on a Piedmont 350 sheet early in print group 2's production could, and most likely was, different from the subject configuration later in print group 2's production when Piedmont 350 sheets were again printed.

Backs like the brown Hindu's, Sweet Caporal 649 and others appear to have been printed for a short period of time, with a set number of sheets. These sheet configurations would be consistent because a later printing of the cards didn't occur.

Yes, you may find a print defect that is indicative of one sheet for even the most common back. But it's going to be difficult to find one that effected at least one image of each subject on the entire sheet.