A SMALL WHITE AND RUSSET JADE 'CHILONG' DISC, BISong DynastyDeftly carved in high relief with two sinuouschilong, the reverse in subtle relief with two mythical beasts.5.5cm (2 1/8in) diam.Provenance: 宋 雙螭龍紋玉璧Compare a similar Song dynasty jadechilongbi, illustrated inCompendium of Collections in the Palace Museum: Jade 5, Beijing, 2011, p.186, pl.213. See also a larger example of a jadechilongbi disc, Song/Ming dynasty, sold at Christie's Hong Kong, 4 April 2017, lot 166.北京故宮博物院藏一件宋代白玉螭紋璧與本器形制類似，見《故宮博物院藏品大系：玉器編5》，北京，2011年，頁186，圖版213。參考一件直徑較大的宋或明褐白玉雕夔龍紋璧，售於香港佳士得，2017年4月4日，拍品166。