This poster was done by Bill Graham and the Dead to discourage too many folks from showing up to the Greek Theatre in the 80's. Bill and company had set up a live stream feed at Kleeberger Field with restrooms, concessions and medical aid to help ticketless fans to hear the show.
This one survived and has been siting safe for decades. 14 1/2 x 19 13/16 inches. We are here to make people happy, thank you for your business.