Some info verified using a DCM scan (http://digitalcomicmuseum.com/).
On sale date from the publication date found at the Catalog of Copyright Entries, Part 2, Periodicals, New Series, Volume 35, January-December 1940, Numbers 1-4. Second class permit. Copyright number 441198.
Alter Ego #111 (July 2012) features three different preliminary covers to this issue by Alexander Kostuk on Page 40.
Art credits from Jerry Bails Who's Who: http://www.bailsprojects.com/bio.aspx?Name=BLITZ%2c+KAY