The 1994 Upper Deck Diamond Collection Set of 9 is a vintage baseball trading card set featuring Major League players such as Don Mattingly, Cal Ripken Jr., and David Justice. Manufactured by Upper Deck in the United States, each standard-sized card is made of card stock and showcases players from the 1994 season. This original set of 9 trading cards is a must-have for collectors looking to add to their sports memorabilia collection, highlighting some of the biggest names in baseball from that era.