A Henan Ribbed Jar. Song Dynasty. Photo Sotheby's

he well-potted ovoid body surmounted by a broad upright neck with lipped rim, the sides encircled by a band of slender vertical ribs applied in white slip beneath a rich brown glaze stopping above the foot, the shoulders set with tall strap handles incised with slender vertical ribs: Height 10 7/8 in., 27.6 cm. Estimate 50,000-70,000 USD

Sotheby's. Fine Chinese Ceramics & Works of Art. New York. 14 september 2011 www.sothebys.com