Was given a large lot of cards, mostly baseball. Two of them were from the 1991 Donruss set, looking normal from the front...but have Confidential stamped into the back. It's not printed, clearly stamped, you can feel it when you run your finger over the card back.
Did not find anything about them at all here.
Anybody know? Are they, perhaps, pre-production samples? Are they listed and I just missed them? Thanks in advance.
VERY slow trading due to health problems. Not transferrable so safe to trade with, just moving is painful and can't always access the cards.
Cardboard History My COMC
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