William Robertson (20th Cent. Kwakwaka'wakw) ''Kwakiutl Hamatsa Mask'' Painted Cedar 12''x48''x12''. Polychrome painted and carved u-form raven hamatsa mask with three miniature applied bird masks. Articulated beak with woven cedar bark hair. Signed on the interior. Overall excellent condition. Mounted on verso with metal bracket for wall display. From a distinguished corporate collection, Washington State.