Thread: What are the rarest backs (not just T206 or T Cards)
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Old 11-03-2017, 05:47 PM
BobC BobC is offline
Bob C.
 
Join Date: Apr 2009
Location: Ohio
Posts: 3,275
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Probably not as rare as some backs where there are only a small handful known to exist in total, thought the '21 Herpolsheimer's should at least get an honorable mention as only a single card is known to exist for each player.
Attached Images
File Type: jpg 1921 Herpolsheimer's McGraw.jpg (70.9 KB, 440 views)
File Type: jpg 1921 Herpolsheimer's ~ McGraw Back.jpg (62.5 KB, 445 views)
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