A portrait of Mark Tobey by the sculptor Ricci Riggenbach:
Bronze patinated plaster, 40 cm high, titled Mark Tobey , signed Ricci Riggenb(ach)
and dated Chexbres 64
The photo (right) shows Tobey and Riggenbach discussing the portrait in Basel 1964 (see the catalogue: Der Sammler Theodor Ahrenberg und das Atelier in Chexbres,
15 Jahre mit Kunst und Künstlern 1960 – 1975. Kunstverein Düsseldorf, 1977)
