A diamond and white gold wristwatch, by Buccellati. Photo: Christie's Images Ltd 2010

With quartz movement, the square engraved dial with black hands, within a collet-set diamond bezel, to the openwork 18k white gold bracelet of foliate motif, trimmed with collet-set diamonds, mounted in 18k white gold, 7 1/8 ins., with Swiss assay mark. Caseback signed Gianmaria Buccellati, nos. 4222 and 60 - Estimate $15,000 - $20,000

Christie's, New York Jewels, 15 June 2010, New York, Rockefeller Plaza www.christies.com