DC · March, 1956
DC house ad for Showcase #1 (Mar-Apr 1956)
The 10,000 Secrets of Batman!; The Diamond Mine on Broadway; The Phantom Bodyguard; puzzle: The Batman Whirly-Word Game; cartoon: Casey the Cop; PSA: Binky in Healthy Teeth for You and Your Pet!; Sleuthing with Science (text)
Artists: Dick Sprang, Ruben Moreira, Joe Certa