su-weet!
Thanks! I first learned about this artwork from a 1942 magazine I bought with an article on Mexican propaganda (I earlier posted some photos from the magazine). I was intrigued when I first saw it in the magazine, so I was glad to find a copy for sale.
It was evidently printed in at least two different styles:
* A signed "art print" without the text, apparently on better quality paper. The Art Institute of Chicago has one of these:
http://www.artic.edu/aic/collections/artwork/45816* A larger poster style with the text, on crummier paper. This is the one I have.
And here is the artwork reproduced in the 1942 magazine: