Feo y Gallo
You can find the full illustration here.
http://helbetico.tumblr.com/post/32878785559/calaveras-y-diablitos-ilustración-que-fue-para
You can find the full illustration here.
http://helbetico.tumblr.com/post/32878785559/calaveras-y-diablitos-ilustración-que-fue-para