A RARE 'QINGBAI' 'DUCK' BOX AND COVER SOUTHERN SONG DYNASTY

in the form of two conjoined circular boxes, the covers of conforming shape carved with two recumbent ducks, its feathers incised with details, covered overall in a translucent glaze tinged with blue, the interior of the covers, interior rims and base left unglazed revealing the white body (2)