On sale date from the publication date found in the Catalog of Copyright Entries, Part 2, Periodicals, New Series, Volume 34, 1939, Number 4. Second class periodical. Copyright number 428672.
Cover is signed as listed, but corresponds to no artist found in the Who's Who for any publisher.
Script revision from Gustavson to ? by Craig Delich. The Who's Who does not indicate that Gustavson wrote this strip and no other evidence extant indicates that he did.