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A three-program receiver "Sphere PTP-212" with a cassette player since March 1987 has been producing the Rostov Watch Factory. The combined device was developed in 1985 and was produced until the end of 1991. Three-user subscriber receiver with cassette player "Sphere PTP-212" - this is the official name of the combined model. The authors of the development of PTP: OI Andreev, A.P. Leontyev, A.A. Solodelov and A.P. Tolochenko. The price of the combined apparatus is 250 rubles. There is no data on PTP yet. The Rostov Watch Factory is a defense enterprise of minaviaproma that in the mid-80s of the 20th century tried to start production of non-core products, such as PT with tape player '' Sphere PTP-212 '' and PT with tape recorder 'Vityaz PTP-212-1' .