This is a 1990 Upper Deck baseball trading card fresh out of box set featuring Ken Griffey Jr of the Seattle Mariners. This error card (card number 156) is from the base set and is considered a rare find for collectors. Being a part of the Major League Baseball (MLB) and manufactured by Upper Deck, this card is a sought-after item for fans of the sport and memorabilia enthusiasts alike. This card is quite possibly a PSA 10.