Original post here. Sourced on tumblr to olderoticart via threatsex. This is a cropped version of the cover of the men’s magazine World of Men (August 1964). Here is the whole image, which I found in this index:

Full image contains the text “World of Men. Exposé: Lust Wild Divorcees are prowling for you. Self-Analysis: Are you the victim of Unnatural Desires? House parties are hell — a coed tells all. The helpless beauties of the Nazis circus of agony.”