Lot 1009. A Yaozhou celadon conical bowl, Northern Song-Jin dynasty (960-1234); 7 ¾ in. (19.7 cm.) diam. Estimate 6,000 - USD 8,000 USD. © Christie's Image Ltd 2019.

The deep, slightly rounded conical sides that rise to a slightly flared lipped rim are applied on the interior with five slender ribs of slip that define five petals, and the bowl is covered inside and out with an olive-green glaze that thins on the ribs.