Mario posted this ad to Facebook. It was published September 22, 1941, in Time Magazine. It’s unique in that it shows three of the prototype jeeps .. The Bantam BRC-60, The Willys MA (2 of them), and the Ford GP. The ad was created by DeVilbiss Spray Systems of Toledo, Ohio.
https://www.facebook.com/mario.r.maipid/posts/4637446769598838
Interesting to note that this advertisement was created by DeVilbiss, A long time trusted name in spray painting equipment. I assume the connection was Toledo, Today, although the name brand survives, I seriously doubt the spray guns are made in the U. S. A. But the Jeep, no doubt, still made in America.