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Since 1968, the color television set-top box Electron-C has been experimentally produced by the Lviv Television Factory. The color television set-top box "Electron-C" is an exhibit of the Moscow Polytechnic Museum. No model information available. It is only known with the black and white TV that she could reproduce color programs. Perhaps it was a mechanical method with three rotating color filters in front of a black-and-white kinescope screen and a mirror that transmitted a projection to another mirror, in which a color image was already obtained. But these are my own thoughts, and how it all really happened is a question! While information about this console or the principle of its work could not be found.