A Chinese mottled russet jade disc bi, Warring State/Han Dynasty, 5th century B. C.-3th century A. D. finely carved in relief on both sides with comma spirals, set within slightly raised borders. Similar examples see Christie's Hong Kong, 3/12/2021, lot 2725; also see the same house, 29/11/2022, lot 2711, 9.5 cm diameter, fitted box