Mark Tobey (1890-1976), Sans titre, 1959, tempera sur papier, signée et datée, 20x15 cm Provenance: Collection privée Seattle, Collection privée suisse Berne depuis plus de 20 ansCertificat du "Committee Mark Tobey", Dr Heiner Hachmeister, 18.02.2019, n°18/02/19-59.32 Mark Tobey (1890-1976), Untitled, 1959, tempera on paper, signed and dated, 20x15 cm Provenance: Private Collection Seattle, Swiss Private Collection Bern for more than 20 years. Certificate of the "Committee Mark Tobey", Dr. Heiner Hachmeister, 18.02.2019, no. 18/02/19-59.32