The product is a set of 1990 Upper Deck baseball trading cards featuring Don Mattingly of the New York Yankees. These cards are promo proof error samples without autographs or any other special features. They are standard-sized cards manufactured by Upper Deck in 1990, and they belong to the Major League (MLB) season of that year. This lot of trading cards is a unique find for collectors looking for original, error-filled cards from the same manufacturer and featuring one of the most iconic players from the era.
1990 Upper Deck DON MATTINGLY “No Name” Promo Proof Error Sample Cards #191 Yank
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