Catalogue entry no. 401 by Max Loehr:
401 Ornate Ring-Disk
Jade of tortoise-shell color, with areas of incipient calcification. The narrow surface of this ring-disk is decorated with a deeply carved and finely incised pattern, the center of which is occupied by a kind of t’ao-t’ieh mask. Along the outer edge, to either side of the bands issuing from the mask, are two animal heads facing in a clockwise direction. Strongly modeled and overlapping bands and spirals, symmetrically arranged on either side of the mask, fill the rest of the disk. The reverse side is plain. Beveled inner and outer edges. The disk is broken in two places and repaired with two small metal pins fitted into holes drilled into the jade on either side of the breaks. Later Eastern Chou.