http://www.invaluable.com/auction-lot/property-from-a-private-german-collection-sigmar-102-c-jih459d9lsPROPERTY FROM A PRIVATE GERMAN COLLECTION SIGMAR POLKE B. 1941 SHEET FROM SKETCHBOOK (THREE SMILING DESERT MOUNTAINS)<br><br>watercolour on paper<br><br>Executed in 1968.<br>PROVENANCE</strong><br><br>Acquired directly from the artist by the present owner <EM>circa</EM> 1970<br>EXHIBITED</strong><br><br>New York, Museum of Modern Art; Hamburg, Kunsthalle, <EM>Sigmar Polke: Works on Paper 1963 - 1974</EM>, 1999, p. 182, no. 293, illustrated in colour
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