Norm, a couple of us have an old British home version of Concentration, probably from the late fifties. The game features prizes, Takes, Forfeits and Wild Cards...but no rebuses. You just make matches, and the player with the biggest prize value when all the matches are made is the winner. There's also a note saying that "every effort has been made to keep as closely as possible to the actual programme."
Do you know anything about the international versions of the show back in the early days? We've heard stories that back then, overseas productions would rip off American versions of shows without licensing the formats. Would that have been something you guys would have heard about while working on the show over here, did they actually license a non-rebus version of the show, or did the British show play exactly like the American and it's the home version that has this glaring omission?