Mask Doctor's Item Number: E274245-0 from the National Museum of Natural History
From card: "Carved in high relief. Represents the land otter. Exhibit Hall 9, 1987. Identified in exhibit as Shaman's Mask - The Spirit of the Land Otter Man, Tlingit. Illus.: Hndbk. N. Amer. Ind., Vol. 7, Northwest Coast, Fig. 7, pg. 614."