Imi Knoebel (Dessau 1940 – lives in Düsseldorf). Untitled. 1984 Acrylic on masonite. 203 × 171,5 cm (79 ⅞ × 67 ½ in.). Signed and dated in pencil lower left: imi 84. Signed and dated in red brush on the reverse: imi 84. [3072] Provenance: Galerie Heike Curtze, Dusseldorf / formerly Private Collection, Germany (acquired 1984 at Galerie Heike Curtze) <div style="padding:56.25% 0 0 0;position:relative;"><iframe src="https://player.vimeo.com/video/819149944?h=50ebf27fb0&amp;badge=0&amp;autopause=0&amp;player_id=0&amp;app_id=58479" frameborder="0" allow="autoplay; fullscreen; picture-in-picture" allowfullscreen style="position:absolute;top:0;left:0;width:100%;height:100%;" title="Imi Knoebel"></iframe></div><script src="https://player.vimeo.com/api/player.js"></script> We would like to thank Christian Lethert, Galerie Christian Lethert, Cologne, for kindly providing additional information