We thank the Otto Nebel-Stiftung, Bern, for the confirmation of this work.
Signature: Signed and dated lower centre: 1940 Nebel, as well as numbered, dated and signed below the paper: u.Z.71. "Im Sechs-Takt". 1940 - Nebel.
Image rights: Courtesy of Koller Auktionen
Galerie Heinz Holtmann, Cologne (verso with the label).
Sammlung Kenda Bar-Gera, Zurich.
Private collection Switzerland.