Ahlen, Kaldewei Kulturstiftung. Foto: Fotostudio Bartsch, Berlin
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Courtesy Koller Auktionen, Zürich
Archiv Eigentümer(in) / Owner's archive
Christie's Images Ltd / ARTOTHEK
Sammlung Würth, Künzelsau. Foto: Archiv Würth
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Board of the Trustees of the University of Illinois on behalf of its Krannert Art Museum University of Illinois. Purchase through the Festival of Arts Purchase fund 1950-2-1