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.
The story title is taken from the cover blurb.
first line: "With the fury of a savage beast, the white lord of the jungle struggles against mysterious and deadly foes..."
It's likely that there is actually very little real Zolnerowich art here. This has all the earmarks of a pastiche with swipes and tracings pieced together from earlier Zolnerowich strips.