Marie VASSILIEFF (1884-1957) African mask, 1953 Leather and bark sculpture forming a brooch. Signed and dated on the back. 7 x 5 x 2.5 cm Provenance : - Ruth A. Wall (1917-2009), American artist who belonged to the American abstract expressionist art movement circa 1950-70. Acquired from the artist. - Claire P. Carlevaro, Art exchange Gallery, San Francisco. Offered by the American artist on the occasion of the publication of her book Love of the stone, The story of Ruth Wall. - Private Franco-American collection. Acquired from the above. We would like to thank Claude Bernes for confirming the authenticity of this work.