Disk (<em>bi</em> 璧)

Perforated disk of the type pi [bi] 璧; bored from both sides, leaving median ridges; obverse: mottled, lustrous shades from cream to dark mahogany brown; reverse has a paint like surface of warm tan with a cloudy dark brown area; both surfaces speckled with dark strata marks. (Rim has old and recent chipped areas and one probable mend.)