The 1991 Upper Deck Baseball Complete Set includes two sets of trading cards featuring players like Chipper Jones and Mark Grace. These vintage cards are original and manufactured by Upper Deck, with an autograph from Mark Grace. The set is a classic representation of Major League Baseball from the 1991 season, making it a sought-after collectible for baseball fans and card enthusiasts. Each card is made of card stock and showcases players from the MLB World Series in English language.