A JADE DOUBLE DISK, BI, WARRING STATES TO WESTERN HAN DYNASTYJade. China, Warring States period to Western Han dynasty, 5th century BC to 1st century ADOf circular form, the disk neatly carved to both sides with raised comma-spirals, the pierced narrow inner ring neatly incised with scrolls and held in place by four rectangular struts. The translucent stone of a pale celadon tone with white clouds and black specks as well as a semi-translucent patch and further smaller areas of beige-brown color. Few small chips, some smoothened, and natural fissures. During the Warring States period and Han dynasty, a great variety of carved embellishment and decoration on jade bi disks emerged. In addition to lavish grounds of raised bosses and spirals, openwork and pierced techniques skillfully executed with metal tools were particularly favored. The present lot's double rings joined by four small segments is noteworthy as an example of the carver's ingenuity.Museum comparison: Compare a related concentric pierced jade huan disc, Warring States period, illustrated in Compendium of Collections in the Palace Museum: Jade 3, Beijing, 2011, p. 128, no. 124. Compare a closely related jade double disk dated to the Warring States period in the collection of the Harvard Art Museums, object number 1943.50.544.Auction comparison: Compare a closely related jade double disk dated to the Western Han dynasty, 10.1 cm diameter, at Bonhams Hong Kong in The Sze Yuan Tang Collection of Chinese Jades on 5 April 2016, lot 27 (sold for HKD 1,240,000).DIAMETER 8.7 cmProvenance: Private collection of Professor Filippo Salviati.