Bettini Phonograph Laboratory · 1 obras en el catálogoObrasBBettini micro-phonograph micro-diaphragms for phonograph andBettini micro-phonograph micro-diaphragms for phonograph and graphophone ; Bettini celebrated "operatic musical records" and autograph-records of world famous artists1965
BBettini micro-phonograph micro-diaphragms for phonograph andBettini micro-phonograph micro-diaphragms for phonograph and graphophone ; Bettini celebrated "operatic musical records" and autograph-records of world famous artists1965