Posted By:
fkwI have always thought the "single" upside down overprint was an accident by the printers that wasnt caught. And the "double" overprint was when the printers again accidently put the sheet in upside down and when they saw the goof they did it again the right way.
I never knew the overprint was red. Now I see It is the same exact overprint commonly found on Sweet Caporal cards, so it is really just a printers goof. It shows that the Old Mill Southern Leaguers cards were printed in the same factory as the Sweet Caporal 150 subject cards. I guess they only goofed a couple sheets with that overprint. Very Rare and interesting.
Frank