A rare white-glazed pottery flask, China, Northern Qi dynasty (AD 550-577). Estimate USD 2,000 - 3,000. Photo Christie's Image Ltd 2015

Of flattened ovoid form, one side molded with a monster mask, the other with a stylized floral ornament, covered overall with a thick creamy-white glaze falling short of the flared foot; 7 ½ in. (19.5 cm.) high, box

Provenance: The Collection of Robert H. Ellsworth, New York, acquired in Hong Kong, 1987.

Property from the Private Collection of Robert Hatfield Ellsworth

Christie's. THE COLLECTION OF ROBERT HATFIELD ELLSWORTH VOLUME VII: CHINESE WORKS OF ART ONLINE