[swarmee]

1979 TCMA Baseball History Series the 1950's - [Base] - Printing Errors #10 - Ted Williams (Billy Johnson, Jack Sanford)
Courtesy of COMC.com

Yeah, multiple printings on the same stock, while not common, did happen. Printing mistakes can be somewhat valuable, and usually the grading companies will ignore them unless they're a straight up Wrong Back for most companies. While it does show Mantle, the printing is not as distinguishable at a distance, so I'm not sure it would be orders of magnitude greater valuable. I'm thinking it might merit a price of $1-2K.