Notes:
The indicia says "Vol. 1, No 5", but the cover has "Number 4" on it.
On sale date from the publication date found in the Catalog of Copyright Entries, Part 2, Periodicals, New Series, Volume 35, 1940, Number 2. Second class permit. Copyright No. B 449976. Issue number 5 was the number reported to the Copyright Office. See https://publicrecords.copyright.gov/application-card/CC19381945B_448000-449999.1977 for more detail. Copyright renewed 1967-06-01 as RE 411108 from Catalog of Copyright Entries, Third Series. Part 2: Periodicals Jan-Dec 1967: Vol 21, page 407.
This issue contains a C. C. Beck illustrated advertisement (1/4 page) for the Captain Marvel Power Siren, which could be purchased at newsstands or obtained free if the reader cut out and mailed in three certificate coupons that appeared in Fawcett's Whiz Comics, Master Comics and Slam-Bang Comics. This ad is reprinted in Alter Ego #141 (August 2016), page 79.