I've test played a few of the TARV cornets from Leningrad, being involved in the Vienna Russian Wind Orchestra - the only orchestra outside the former Soviet Union to concentrate on Russian military band music in original settings and arrangements (). These instrument were better than they looked; but not better than the usually low prices asked for them. Acceptable as tutti instruments, but usually not capable of solo playing. For that, the Eastern Bloc used either the Amati and Cerveny brands from the CSSR or the GDR-made Weltklang stuff. Most musicians from these countries, however, tried to get hold of Western instruments.
There was a joke in those days: What's the difference between a Capitalist and a Communist violin player? The Capitalist has an old violin and a new car, with the Communist it's the other way round.