Notes:
The indicia says "Vol. 1, No 4", but the cover has "Number 3" 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. Class B periodical Copyright number B 447071. Reported as issue #4 to the Copyright Office. One sale date confirmed as February 23 in the promotion advertisement for this issue on the back cover of Master Comics (Fawcett, 1940 series) #1. See https://publicrecords.copyright.gov/application-card/CC19381945B_446000-447999.1072 for more detail. Copyright renewed 1967-06-01 as RE 411109 from Catalog of Copyright Entries, Third Series. Part 2: Periodicals Jan-Dec 1967: Vol 21, page 406.