MID WARRING STATES PERIOD, CIRCA 400-300 BC

Compare a similar jade disc excavated from the tomb of King of Zhongshan, Pinghsan County, Hebei Province, illustrated in Cuo mu - Zhanguo Zhongshan guo guowang zhi mu, Beijing, 1996, col. pl. 40, fig. 1. A few areas on the rim of the present disc have altered to an emerald colour from being in contact with bronzes, suggesting that it was mounted on other vessels or hung on the walls as decoration.