That's why I asked,, if the concert was 1968,,that is what it says on front isn`t it,,then this must be a repro and or a re-make for some purpose !! Like I said put "large poster" in your google search and see if all those listed have the same wording !!
It is not a reproduction poster because there were no posters in 1968 of this event. It's about a event that never did go on air in 1968 because it was withheld.
more info: The Rolling Stones Rock and Roll Circus is a film released in 1996 of an 11 December 1968 event put together by The Rolling Stones. The event comprised two concerts on a circus stage and included such acts as The Who, Taj Mahal, Marianne Faithfull, and Jethro Tull. John Lennon and his fiancee Yoko Ono performed as part of a supergroup called The Dirty Mac, along with Eric Clapton, Mitch Mitchell, and Keith Richards.
It was originally meant to be aired on the BBC, but the Rolling Stones withheld it. The Stones contended they did so due to their substandard performance, because they had taken the stage early in the morning and were clearly exhausted.[citation needed] Many others believe that the true reason for not releasing the video was that The Who, who were fresh off a concert tour, upstaged the Stones on their own production