Lot 623. A black-glazed 'oil-spot' bowl, Northern Song-Jin Dynasty. Estimate 10,000 — 15,000 USD. Photo: Sotheby's.

the deep rounded sides rising from a slightly splayed foot to an inverted rim, covered overall with a mottled black glaze, the interior with five russet-spotted roundels against a ground of further irregular metallic russet 'oil-spots', the glaze falling short above the foot to reveal the buff-colored stoneware body. Diameter 7 1/4  in., 18.4 cm

Sotheby's. Important Chinese Art, New York, 14 Mar 2017, 10:30 AM