Prototype set is here

[earlyfilm]

Originally Posted by TVtommy

It's just that the only thing that to me that could be as interesting or as suspenseful as this adventure would be some un-earthed Zenith color proto's or documentation showing the evolution of Robert Adler's beam deflection color demodulation circuitry!

Zenith was unique in that they first made FCC testing sets for both the CBS system and then later for the NTSC system. If this is not an RCA prototype, then it most probably is a Zenith. (While Westinghouse was in it early, I don't think they were in it this early.)

James