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MarkPictured is a Baseball one I own, and know to be real. It came from a Live Hunt Auction, and matches known exemplars to a tee.
I am also picturing the Football one currently on Ebay, which appears to be a reproduction. The ebay item # is 220232795400. Leon, it appears to be strikingly similar (if not identical) to your potential consignment. This Ebay piece has a Buy it Now price of $295, and this seller does have a worse looking baseball example as well.
Looks like Carlton is right on, as usual... the odds of two of these pieces surfacing simultaneously is miniscule, at best.