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1957 Showcase 6 Challengers of the Unknown LOWER GRADE:
$630.99
1957 Showcase 6 Challengers of the Unknown LOWER GRADE
Publisher DC
Issue # 6
Comic Era Silver Age
Grade/Condition LOWER GRADE
Remarks/NotesOrigin and first appearance of the Challengers of the Unknown, the first Silver Age hero team, and the first original concept for a Silver Age
