Felt tip pen One signed and dedicated on rear of frame, both dated, inscribed and stamped. On writing paper with lines. Each 29,6 x 20,9 cm (11,6 x 8,2 in), the full sheet In orig. frame. Attached: Exhibition catalogue Hanne Darboven. El Lissitzky. Kunst und Pangeometrie, released by Daled, Brussels/Hossmann, Hamburg/Yves Gevaert, Société des Expositions, Brussels, 1973. Slightly different reproductions of these works are on the catalogue's wrapper. [SM].