Disk (<em>bi</em> 璧)

Perforated disk of the type pi [bi] 璧; bored from both sides, leaving median ridge; obverse has mottled shades of dark mahogany brown and cloudy areas of incipient disintegration, reverse of mottled golden browns, olive, and tan with scattered areas of gray incipient disintegration; surface contours irregular in thickness, several gouges or saw marks. (Slight chips on rim.)