Notes:
The on-sale date is the publication date reported in the U. S. Copyright Office filing found at the Catalog of Copyright Entries, Part 2, Periodicals, New Series, Volume 35, 1940, Number 2. Class B periodical. Copyright number B 455005. On-sale of April 25th per a promotional house advertisement in Detective Comics (DC, 1937 series) #39 (May 1940).
Indicia: Batman No. 1 * Spring 1940 Issue
Published quarterly by DETECTIVE COMICS, INC. 480 Lexington Avenue, New York, N. Y.