Quote:
Originally Posted by toppcat
I would presume these were marked with the bigger numbers in a corner or bottom of a column to make life easier for the workers handling the sheets. They did have to be careful that the factory designations were correct to comply with the existing laws of the day and there's no way the tiny factory # little lines could have been read correctly. Hell, I need a magnifying glass to see most of them...
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I don't believe these were damage to stones or print anomalies. They were intentional and the quoted theory above is the one I believe to be the most plausible explanation.