Privatsammlung in der Hamburger Kunsthalle. Foto: Elke Walford

Ahlen, Kaldewei Kulturstiftung. Foto: Fredrik Nilsen Studio, Los Angeles

Saint Louis Art Museum, Bequest of Curt Valentin 185:1955

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