Thanks to the generosity of Darryl Hock, we got the color set for the Early Television museum for a whopping $50. Darryl says it is in excellent condition and will have some pictures when he gets it home.
It is a Sentinal IU-816, made in 1956, and using a 21AXP22. Here is some information on the set:
http://www.earlytelevision.org/sentinal_iu816.html
The black and white set mounted in the wall wasn't for sale.