Master Comics #4 (1940)

Master Comics #4, published in 1940, is a must-have for any serious comic book collector. Featuring the debut of the beloved superhero, Captain Marvel Jr., this issue is a true gem. In it, Cap Jr. gets his powers from the legendary hero, Captain Marvel, after being saved from certain death. Together, they go head-to-head against a maniacal villain who plans to take over the world with a dangerous invention.

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