Lot 227. A small black-glazed 'oil spot' bowl, Song-Jin dynasty (960-1234). Diameter 3 7/8  in., 9.8 cm. Estimate 12,000 — 15,000 USD. © Sotheby's 2018.

the shallow rounded sides rising from a knife-pared foot to a gently incurved rim, covered overall with a lustrous black-brown glaze suffused with iridescent silvery-brown ‘oil spots’ of varying size, the glaze thinning to a chocolate-brown at the rim and stopping irregularly above the foot, the unglazed section applied with a dark brown dressing largely concealing the buff-colored body.

Sotheby's. Important Chinese Art, New York, 12 sept. 2018, 10:30 AM