Some info verified using a DCM scan (http://digitalcomicmuseum.com/).
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 number 447041.
The very long legs wide apart, and small heads often seen from below and sqeezed from above, are all signs of Meskin. Compare with the previous story.
Signed JR in the second illustration