Photograph Courtesy of Sotheby's, Inc. © 2017
Kunstmuseum Winterthur
Saint Louis Art Museum, Gift of George and Edith Rickey 187:1993
Courtesy Metropolitan Museum, New York (Sabine Rewald)
Photograph Courtesy of Sotheby's, Inc. © 2019
Sprengel Museum Hannover, Kunstbesitz der Landeshauptstadt Hannover, Schenkung Volkswagenwerk GmbH, Wolfsburg (1956) / Ali
bpk / The Metropolitan Museum of Art