Early Electronic Television
We recently acquired a package of technical information on this set. It was sent to a TV repair shop in Philadelphia in 1947 by the Stromberg-Carlson company. Schematic diagrams for the TV receiver show a design very similar to the RCA TRK-9 and 12, with a five channel tuner with motorized control (pushbuttons activate a motor to tune channels 1-5).
None of these sets is known to exist today.