A pair of blue and white porcelain dragon bowls. Jiajing Mark and Period. Photo Bonhams

Each of inverted bell form with a flared rim and tall foot, a dragon roundel centering the floor of the well and two dragons on the exterior walls pursuing a flaming pearl above a jeweled lappet band, the recessed base displaying the six-character mark in regular script enclosed within a double ring. 6 1/8 (15.5cm) diameter - Estimate: US$10,000 - 15,000

Bonhams. Fine Asian Art, 21 Jun 2011, San Francisco www.bonhams.com