Imi Knoebel (Dessau 1940 – lives in Düsseldorf). Tag und Nacht III. 1998 3-part: acrylic on aluminium. Each 16 × 12 × 3,5 cm (6 ¼ × 4 ¾ × 1 ⅜ in.). Signed and dated in black felt-tip pen and with brush in yellow, red and blue on the blue image on the reserve: IMI 98. [3236] Provenance: Corporate Collection, Germany We would like to thank Christian Lethert, Galerie Christian Lethert, Cologne, for kindly providing additional information