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Series Years:
On Sale Date:
Publisher:
Format:
Comic Book
Language:
English
Country:
United States
Collector Notes:
Challengers of the Unknown is a secondary title to Superman and Batman etc, rather in the same league as Atom or Hawkman, Blackhawk or Rip Hunter, but still with its own collector following.
There are no 80 Giants or annuals for this title.
Credit:
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