Ace Magazines Released September 1950

Challenge of the Unknown #6 (1950)

Challenge of the Unknown #6 is an issue of the Challenge of the Unknown series from Ace Magazines, released September 1, 1950. Featuring artwork by Warren Kremer. This page represents the regular first-print edition.

Low
$90
Mid
$270
High
$905
Published September 1950
Cover Price $0.10
Pages 36

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Cover art for Challenge of the Unknown #6
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