Catalogue entry no. 383 by Max Loehr:
383 Three Quadrilateral Plaques
Thin, translucent, mottled green jade plaques with tiny perforations in the corners. Each is decorated with curvilinear bands in engraved double outlines, partly scooped out for a plastic effect. On close examination these bands prove to be extremely conventionalized versions of two dragon heads facing in opposite directions and joined by a short striated band in the center of each plaque. Early Eastern Chou.