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The television receiver of the black-and-white image "TVZK" was experimentally produced at the beginning of 1934 by the Leningrad Plant. Kozitsky. The TV with a mirror screw is designed for receiving programs of mechanical television with image decomposition from 30 to 180 lines. The visible part of the image has a size of 4.2x5.6 cm and a viewing angle of 30 degrees, allowing you to watch an audience of up to 10 people. The TV did not go into production due to the high cost of two thousand rubles.