New York, Museum of Modern Art (MoMA), Given anonymously (by exchange), 6.1942.a-c.© 2018. Digital image, The Museum of Modern Art, New York / Scala, Florence

Ahlen, Kaldewei Kulturstiftung. Foto: Fotoatelier Schälchli, Zürich

Richmond, Virginia Museum of Fine Arts. Foto: David Stover

Courtesy Galerie Thomas, München