In 1978, Burger Chef was right with the nations zeitgeist, selling their burgers and fries with a side-order of Star Wars. They were among the first companies to do so and ran a commercials advertising the facts.
We were not frequenters of Burger Chef (they were hard to come by in our neck of the woods), but I swear I had one of these posters on my wall as a kid. Perhaps one of my parents picked it up for their Star Wars crazed kid.
My favorite is this one because of the kid with the Sand Speeder at the start. He is either lost in dream of far off Tantooine or more likely is really really bored. How dare you kid! Show some respect!