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Might have been an ashcan or a promotional giveaway. Library of Congress record: On sale date from the publication date found in the Catalog of Copyright Entries, Part 2, Periodicals, New Series, Volume 34, 1939, Number 4. Class B periodical. Copyright number B 432170. Entry reads: Champion comics,© Worth pub. co.,inc. v. A, 1939, no. 1, Oct. © Aug. 1; B 422614. Volume is A then issue number 1. August 1st is the publication date, "B" refers to it being a class B periodical.