At least the copies I have were taped from GSN in September 2004.
Show E aired on April 5, 12, or 19, 1951. Game 2 is about recent news headlines, so I\'m sure someone with a bit more prowess could narrow that down further.
Shows A and B are in fact consecutive -- as Bill says on the former, it\'s the third day in the new timeslot. Those two are February 27-28, 1952.
Show C is March 5, 1952.
Show D is March or April 1952, as the set is a bit more elaborate/fancy. Not sure about anything more specific than that.
(First three 1952 airdates courtesy of Matt Ottinger.)