Superboy #14

This May/June 1951 DC issue packs 52 big pages into a dime, and the cover by Curt Swan and John Fischetti sets up a deliciously pulpy sci-fi premise: two alien figures flank a futuristic viewing screen on which Superboy appears in full costume, while an elder alien gestures toward the image and declares that the Boy of Steel is "the one person who stands in our way" — and must be destroyed. The teaser for the interior tale, "The Boy from Mars!," promises an interplanetary threat that makes this a wonderfully evocative slice of early-'50s DC adventure.