Karel Teissig's Poster for The Beast is Loose,1966
Some of the best posters I've seen, fantastic reference for illustration projects.
I read Rick Poyner's post on his design observer blog about Karel Teissig, the proclaimed unknown master of Poster Design. A worthy title, and well worth a read. There is a great link to www.terry-posters.com, a fantastic resource to see and buy some amazing designs from the Czech Republic and Poland in particular.