(lot of 2) Chinese Cizhou black 'oil spot' ceramic bowl, Northern Song dynasty, with a slightly flared rim and walls tapering toward the small buff colored foot, with russet highlighting the rim and a splash to the exterior, the well with small silver spots (rim chip), 4.5"w; together with a Cizhou black glazed bowl, the sloping walls with some pale russet short streaks on the black ground below the brown rim, the exterior with a pooling of glaze gathered at the unglazed brown foot, 5"w; Provenance: Estate of Dr. Graeme Hanson, San Francisco, CA