Lot 3224. A Large Northern 'Oil Spot' Black-Glazed Bowl,  Jin Dynasty (1115-1234); 8 1/2 in. (21.5 cm.) diam. Estimate HK$200,000 - HK$400,000 ($25,915 - $51,829). Price Realized HK$150,000 ($19,431). © Christie's Image Ltd 2014

The large bowl with rounded walls rising from a short splayed foot is covered inside and out with a purplish-brown slip underneath a lustrous black glaze suffused with a dense pattern of silver 'oil spots', which ends neatly above the foot exposing the slip. The foot rim is unglazed, revealing the buff ware. 

Christie's. THE SOUND OF JADE AND THE SHADOW OF A CHRYSANTHEMUM, Hong Kong, 28 May 2014