This set is a hybrid model. If I remember right it uses 4 tubes. It is known as a "salesmen sample" because RCA was proud of the cabinetry on their color sets, and made a few styles of "mini" versions in a 9" B&W. I believe each RCA dealer got 1 to display. I don't think they were for the general public. The eBay seller is getting this confused with Zeniths Bicentennial model that came out in 1975. This set is actually earlier and was made I believe from 1969 thru 1972. Typical problems to watch for on this set are bad solder connections. (RCA must have been practicing for the CTC-175)
