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1960 Topps #7 Master and Mentor with Willie Mays. This one has a brown bar on the reverse to the left of the title box that is not on any other copy on COMC.
It's not miscut, since the card is nicely centered. Must be a variation based on being on multiple sheets/different series? Anyone else have one? Is it cataloged anywhere? This would be a good one to have listed as a variation on PSA.