Speaking of which, when I watched the 1972 Once Upon a Mattress the other night, whatever copy they used had all of the original television commercials, and they left them in. It was kind of fun seeing how much everything had dated. And almost every one of the products advertised therein is no longer. Including Blue Bonnet margarine.
As for the show itself - Carol Burnett was, of course, wonderful. But I wasn't thrilled with the adaptation. Many songs were cut, and the ones that remained had verses and chunks stripped out of them. The book seems to have been edited quite heavily, as well. Oh, and Lady Larkin is played by a very young Bernadette Peters.
I have watched a bit of the black-and-white 1964 version on YouTube. I'm not positive, but I think it may suffer from the same editing issues. I guess that comes from presenting a full Broadway musical in a two-hour television time slot. With commercials.