Five-tier tube (<em>cong</em> 琮) with masks

Squared hollow cylinder of the type ts’ung [cong] 琮; short projecting collar at top and base; interior has circular boring marks and irregular median ridge; mottled orange, yellow, reddish and dark browns; decoration: channeled and incised, vertical grooves on sides, bands, grooves and circles on corners. (Scattered chips and small surface defects.)