Licht und Schatten von gleicher Quantität. 1973. Object . Frottage: Graphite on partly die-cut cardboard, laid on black backing board. In aluminum frame under glass. Verso of die-cut cardboard signed, dated and titled. Verso of frame once more signed and dated as well as inscribed with a direction arrow. 32 x 24 cm (12.5 x 9.4 in). Frame: 40 x 40,2 cm ( 16,9 x 15,8 in). [FS].