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					Originally Posted by steve B  The sheet is not a regular production sheet for either the regular set or the MB set. It's a proof sheet. 
 Steve B
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 Hey Steve.
But why would this sheet have full rows of cards featured in the MB set, including the yellow letter/corrected Brinkman, coupled with regular Topps cards? Any ideas on that? Was Topps possibly putting together a proposed set of MB cards (that was changed later) here?