A Junyao bowl, Northern Song-Jin dynasty. Photo Bonhams.

Molded with a wide, curving well and raised on a tall foot, the glaze covering all surfaces except the foot pad of sky blue hue where thickly applied around the lower exterior and interior walls and thinning to a pale olive green along the rim, the glaze layer displaying long craze lines and burst bubbles. 7 3/8in (18.7cm) diameter. Sold for US$ 2,500 (€1,826) 

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