Sunday is Monkey Covers day here at YACB. Because there's nothing better than a comic with a monkey on the cover.
It's jungle lass Sheena vs. Gorilla-Men in 1941 on the cover of Jumbo Comics #32, art by Dan Zolnerowich.
(Standard disclaimer about gorilla-men not really being monkeys applies.)
Image courtesy of the GCD. Click on the image for a larger version.