regarding the 71-72 Zenith, I'm not sure if they used the same chassis 2 years in a row, but I had one very similar to that, except I think the grill was darker, and it had the "space command" remote, which I received for a birthday gift in 1971. Great set, good picture, better than the '68 Zenith color table model we had as our main set. That old zenith never seemed to die, it was just superceded when I got a color set for my bedroom a few years later. I wish I still had it, but then, I wish I had a b&w console as my daily watcher rather than my current Zenith color set.