A Junyao glazed bowl, 13th-14th century. Photo Bonhams.

Potted with a slightly inverted rim to the wide, curving well that tapers sharply inward to the canted foot ring, the mottled blue glaze with a purple russet patch to the interior, thining to pale brown with black flecks along the rim, ending unevenly above the foot exposing the buff-colored fabric. 7 1/4in (18.4cm) diameter. Sold for US$ 2,750 (€2,009)

Provenance: Oskar Gerson Collection, acquired during the 1920's-1930's, Germany, and thence by descent.

Bonhams. ASIAN DECORATIVE ARTS. San Francisco. 18 Dec 2013 -www.bonhams.com