Watercolour, 17 x 11 cm, framed under glass. - Painter, stage designer, weaver a. commercial artist. O. studied at the Hamburg school of applied arts under A. Kling a. M. Brinckmann. He was member of 'Deutscher Werkbund'. He began with expressionist, cubistic, constructivist a. Art Déco works, after World War II he turned to abstract paintings.