Catalogue entry no. 556a by Max Loehr:
556 Pair of Pigs
Highly translucent pale green and opaque cream-colored jade. Prismatic pieces rounded off along the animals’ backs but flat at the rear and bottom. The pieces are schematically carved with sloping cuts and are polished except for the bottoms, the left side of a and the right side of b. The unfinished state of the two sides might indicate that the animals were intended to be placed side by side. On the whole similar to the preceding pair, with perforations in the same places. Probably Eastern Han.