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Radiola network lamp "Concert" in the fall of 1955 was developed by the Riga State Electrotechnical Plant VEF. By 1956, the VEF plant had developed a number of receivers and radiometers on fingertips of various designs and parameters. Some of the units and the chassis of these devices were unified. The devices had a key switch, a rotatable magnetic antenna and a dipole, if there was a VHF band. Class III devices have two speakers, class II and above four. The names of the receivers and the radiometer were represented by precious stones: Diamond, Amethyst, Aquamarine, Crystal, Ruby, Sapphire, Topaz, Amber. There was a river series: Amur, Angara, Terek, Dvina and the musical series: Concert, Melody, Symphony and others. Some of the samples were transferred for production to other plants of the USSR, some were made only by an experimental batch. In the factory newspaper Vefietis (VEFovets) at the end of 1955 it was reported that the task of the Ministry of Radio Engineering Industry of the USSR to develop 15 models of radio equipment and the manufacture of their prototypes by designers and production workers of the VEF was successfully completed. Most of the devices developed were shown at the 1958 World Exhibition in Brussels and were awarded prizes. Many developments were shown the following year at an exhibition in New York (1959). Radiola first class "Concert" was a prototype, made only in a few copies. In 1957, the plant released a limited series of radioactive "Concert", while its external design has not changed. The circuit diagram of the radio, the design and its technical parameters are similar to the radio "Lux". How many radios were released - not installed.