This protest poster from the 80's is coming up for auction at Christie's next month. Kind of awesome.
I imagine it's British, since the other poster in the lot says "We are a little worried about our landlord." and comes from a 1986 campaign to stop the sell-off of a public housing estate in London.
23 June 2009, Pop Culture - Lot 76: Political Posters, est. $1000-1500 [christies]