Lot 139. A russet-splashed black-glazed jar, Northern Song-Jin Dynasty. Estimate 8,000 — 12,000 USD. Photo: Sotheby's

of ovoid form rising from a splayed foot to a short waisted neck with flared rim, the exterior applied overall with a russet-mottled black glaze accentuated with diagonal russet streaks, the glaze falling short of the foot to reveal the yellowish-brown stoneware body. Height 4 7/8  in., 12.4 cm

The dating of this lot is consistent with the result of a thermoluminescence test, Oxford Authentication Ltd., sample no. P106q14. 

Sotheby's. Important Chinese Art, New York, 13 sept. 2016, 10:30 AM