[Jeffhs]

Look at the power cord. It's probably a 3-wire grounded one, which means the TV in that 1950s DuMont cabinet is a flat-panel retrofit -- and why the set is showing a color picture. The DuMont continuous "Inputuner" was probably left in the cabinet, unconnected, for auithenticity's sake; that's why the tuner's eye tube doesn't light, even though the TV is on. Another dead giveaway that the TV is a flat screen would be the power draw of the set, which, with a small (19") flat screen, would be only about 25 watts at the outside. The original DuMont chassis probably had a huge power transformer, more than 25 tubes, and drew something on the order of 300-400 watts, on par with today's large-screen (50"+) flat sets.

BTW, while the TV itself in the picture may not be 1950s vintage, the house wiring may be, as I think I saw the set's AC line cord plugged into a 3-to-2-wire adapter.