An ’Oil Spot’-Type Glazed Bowl Of conical form, the rounded sides rising from a narrow foot, the black-brown glaze attractively suffused with iridescent grey, brown and blue ‘oilskin’ glaze with white flecks, the glaze thinning to chocolate-brown at the rim and pooling thickly at the foot to reveal the clay body. Period: Song Dynasty or later. Diameter: 19 cm.