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. 2.
Cover inaccurate: old Rangers of Freedom team depicted and the story title blurb refers to the "Superbrain" character who does NOT appear in the issue. However, the title does match the story.
Introduction of a new group of Rangers of Freedom.