Catalogue entry no. 523 by Max Loehr:
523 Cup with Bird Handles
Mottled light green, cream, and light brown jade of uneven degrees of translucency, with a glossy polish. The approximately cylindrical lower portion of the cup is divided from the flaring upper portion to a heavy torus. The bird figures, with arbitrarily simplified, involute, band-like bodies in sharp-cornered openwork, face in opposite directions. Their crested heads rise above the rim; their tails issue from the wall below the torus. Except for an incised median line on the birds’ bodies and tails, the surfaces are plain. Late Eastern Chou or Western Han(?).
Salmony notes that the birds “seem to have a pearl in their beaks.” Actually, “the pearl” is a convolute end of the upper part of the beak, defined by an incised curl.