Card Set Name: 1990 Classic WWF (also known as "History of WrestleMania") 

• Card Number: 51

• Card Subject: Hulk Hogan vs. Macho Man (WrestleMania IV) 

The #51 in the set specifically commemorates the "History of WrestleMania IV" match between Hulk Hogan and Randy "Macho Man" Savage.