Catalogue entry no. 510 by Max Loehr:
510 Plaque with Openwork Bird Figure
Light brown translucent jade plaque in the shape of a pointed shield, surmounted by a long-tailed bird with turned head. An involute curl issues from the side of the shield opposite the bird’s tail. Identically engraved on both sides are curvilinear motifs and unobtrusively striated areas. Above the bird’s neck is a small perforated appendage. Late Eastern Chou.