Early Electronic Television Television-Telephone at the General Motors Exhibit | 
   
I noticed in the  picture you posted today "Television-Telephone at the General Motors  Exhibit" they are using an RR359 chassis. you can see the 7 control panel  turned up in front of the crt. Also, that's a 9" crt assembly from the  RR359. RCA must have repurposed many of these for other uses.  | 
      

Courtesy of Steve Dichter

Douglas Daily Dispatch, July 18, 1940
Courtesy of Harry Moore

