House of Mystery #66

From DC's long-running anthology series comes this September 1957 issue, featuring a cover by Amilcar Ruben Moreira that presents one of the strangest encounters in the title's run: a young man holding a white dove stands face-to-face with a mysterious figure in a gleaming iron mask, dramatic red cape, and white gown, who insists — in two urgent speech bubbles — that the mask can never come off. The featured story teased on the cover is "The Girl in the Iron Mask," and the setting of lifelike animal sculptures in the background adds a quietly unsettling atmosphere to the scene. At a dime a copy, House of Mystery #66 delivers exactly the kind of eerie, compelling premise that made DC's mystery anthologies a staple of 1957 newsstands.