Action Comics #431 DC Comics (1938)

Stamp on cover

• "The Monster who Unmasked Superman!" (Superman) written by Cary Bates, penciled by Curt Swan and inked by Murphy Anderson.
• "The Case of the Runaway Shoebox!" (Green Arrow) written by Elliot S. Maggin, penciled by Dick Dillin and inked by Dick Giordano.