SHANG DYNASTY (CIRCA 1600- AD 220) A CHINESE UNEARTHED JADE NOTCHED DISC, BI D 12.4 cm. (4 7/8 in.) Thickness 0.6 cm.
商 生坑玉璇璣 直徑 12.4 cm. (4 7/8 in.) 厚 0.6 cm.