When I saw Pirates: in an adventure with scientists they showed the one of the early 1940s film classification cards at the beginning. I instantly recoginised it due to it appearing before every film in my Ealing studios collection (plus I had watched Whiskey Galore for the billionth time before seeing Pirates, and that had the same card.)

It made me think about the type of logo 'gag' filmmakers have for the studio vanity plates when they make films set in a certain era. e.g. When a filmmaker uses an old version of a logo relative to the year it's set.

Concerning Star Wars, when they showed the Original Unaltered film print at the Senator theater the print had a BBFC card, but bear in mind that it has the title 'A New Hope' attached to it so it's probably from the 1981 retitled version.

http://www.youtube.com/watch?feature=player_embedded&v=OEctWVF4J_w#t=175s