Copyright data (provided by Frank Motler)
America's best comics. © Nedor pub. co. v. 2, 1943, no. 3, July. © May 13; B 588056. 22090
The on-sale date is from the publication date recorded in the Catalog of Copyright Entries, Part 2, Periodicals, 1943, New Series, Vol. 38, No. 3.