Notes:
The on-sale date is from the publication date recorded in the Catalog of Copyright Entries, Part 2, Periodicals, 1940, New Series, Vol. 35, No. 3.
This is the final appearance of the "Tom Mix" feature in Crackajack Funnies. The feature appears next in Tom Mix Comics (Ralston-Purina Company, 1940 Series) #1 (September 1940).