A celadon and russet jade seal. 17th century. Photo Christie's Image Ltd, 2011

Of square form, surmounted by a mythical beast standing four-square, looking forwards with a lively gaze and alert tail, incised detail to the face, body and tail; 3 1/8 in. (8 cm.) wide, woodstand. Estimate £6,000 - £8,000. Price Realized £16,250

Christie's. Fine Chinese Ceramics and Works of Art, 8 November 2011; London, King Street www.christies.com