1980 Topps Pepsi
1980 Topps Pepsi is a 22-card set that was not released until 25 years later. The cards have a design similar to that of the 1980 Topps base set, but with the addition of a Pepsi logo in the upper-left corner. Also, the team name "flag" on the bottom-half of the card is entirely in white with blue letters for all cards and a color scheme change. The checklist parallels the "All-Star" subset from the base set.
It is unclear why the set was never released. For the next quarter-century, what little cards that were printed remained in the possession of Topps. The set was eventually released in 2005 through The Topps Vault. Topps auctioned off a full set in uncut-sheet form at the 2011 National Sports Collectors Convention.
Cards from this set are incredibly rare, with singles of even the most common of players selling for well over $1000.
Not formally released until 2005.
NOTE: Any assistance in properly identifying each player's card number would be greatly appreciated.