A' Henan' black-glazed stemcup and a 'Jizhou' 'tortoiseshell'-glazed jar, Song dynasty. Estimate 30,000 — 50,000 HKD (3,399 - 5,665 EUR).  Photo Sotheby's.

he stemcup applied with a thick black glaze stopping at the top of the stem revealing the light grey ware beneath, the mouthrim dressed with an ivory glaze; the jar with a wide neck, covered overall with a black glaze highlighted with olive-coloured streaks falling short above the foot exposing the dark grey body - 7.4 and 12.9 cm., 2 7/8  and 5 1/8  in. 

PROPERTY FROM AN OLD HONG KONG COLLECTION 

Sotheby's. Chinese Art, Hong Kong, 03 déc. 2015, 02:00 PM