Desc: Opernball: Directed by Géza von Bolváry. With Heli Finkenzeller, Fita Benkhoff, Marte Harell, Hans Moser. After Richard Heuberger's operetta of the same name, Géza von Bolváry staged a high-spirited confusion about infidelity and amusing entanglements in Vienna at the turn of the century.