Nice collection bro, I like this one and those colors really pop.
Thanks! Yeah, that is one of my favorites. It's not too common to see Mexican one sheets from this era with the landscape orientation
The artist, Antonio Arias Bernal, also did a lot of caricature, political cartoons, and propaganda work.
The book "El siglo XX en la mirada de Antonio Arias Bernal" has some cool examples of his non-poster work (sadly out of print):
http://www.amazon.com/dp/9709885170