An unusual bronze circular 'lion and grapevine',  mirror. Tang dynasty (618-907).  Photo: Christie's Images Ltd 2012

The thin mirror crisply cast in high relief with a crouching lion that forms the knob in the center of six lions shown in various positions amidst scrolling grapevine including one sitting upright and facing outward with left forepaw raised and the other placed on its rear leg, with silvery grey patina; 5 7/8 in. (12.5 cm.) diam., 3/16 in. (.4 cm.) thick, box - 314.5g. Estimate $15,000 - $20,000

唐 海獸葡萄紋銅鏡

Christie's. Luminous Perfection: Fine Chinese Mirrors from the Robert H. Ellsworth Collection, 22 March 2012. New York, Rockefeller Plaza