A white jade 'Dragon' plaque, Qing dynasty, 17th-18th century. Estimate 50,000 — 70,000 USD. Photo Sotheby's.

of oval shape, carved with two dragons on the front and a two-character inscription Long De (Virtues of Dragon) on the back, surrounded by spiral cloud patterns - Height 2 in., 5 cm

Sotheby's. Inscriptions: History as Art New York, 17 mars 2015, 01:30 PM