Disk (<em>bi</em> 璧)

Perforated disk of the type pi [bi] 璧; bored from both sides, leaving median ridge; obverse is mottled medium to very dark green with traces of brown, about half the surface is clouded with gray incipient disintegration, reverse is completely but thinly covered with the same; some saw marks on each surface. (Several chipped areas on rim.)