A black glazed conical bowl with russet 'partridge-feather' markingsNorthern Song/Jin dynastyCarefully potted with a flared rim to the sloping walls raised on a low foot ring and shallow recessed base, the shiny black glaze showing matte russet splashes of large size across the deep well but densely mottled on the exterior walls with tiny specks of russet that also appear on off-white surface of unglazed fabric along the exterior foot.5in (12.6cm) diam.注脚Provenance:Property from a San Francisco EstateThe bowl is of a well-known type preserved in museum and private collections, related to shards excavated in layers datable between 1050 to 1150 at the Guantai kilns, Hebei province: see Robert D. Mowry, Hare's Fur, Tortoiseshell, and Partridge Feathers: Chinese Brown- and Black- Glazed Ceramics, 400-1400, Cambridge, 1996, no. 38a & b, pp. 142-144.