The on-sale date is from the publication date recorded in the Catalog of Copyright Entries, Part 2, Periodicals, 1942, New Series, Vol. 37, No. 3.
Celardo seems to be only cover artist who poses Sheena full-figure in the foreground as seen from ground-level. See issues #20 & 27 covers for similar approaches and review all the other covers between #21 and #42 and NOT see this approach.
The story title is taken from the cover.
Eisner and others have been collaged together with new inking and some fill-in art. Any Eisner art here has been traced by shop personnel and used to tell a different story.