Beranek is definitely Czech. Company started @ 1941, at Skrdlovice, by Emanuel Beranek. It then became part of ULUV, with externally appointed designers, under the direction of Professor Veliskova. Designers in the 1950s include various members of the Beranek family, Jan Kotik and Maria Stahlickova amongst others. The 1960s saw new designers arrive, including Frantisek Vizner, Lubomir Blecha, and Vladimir Jelinek.
Weights seem to have been a major area of production, and some big name designers contributed, Ladislav Oliva, Petr Hora, Rene Roubicek and Cermak among others. Many weights from the 1970s and 1980s are still in production.
Company was returned to the family of Emanuel Beranek after 1990, and is still a going concern.