A TEADUST-GLAZED SQUARE WASHER QING DYNASTY, DAOGUANG PERIOD

the straight-sided cusped square body rising from a recessed base to a broad indented rim, finely carved to each face of the exterior with a quatrefoil landscape panel, the interior carved in high relief with a pair of crabs, covered overall in a rich olive-green glaze 

Christie's Paris, 26th November 2002, lot 116.