An Art Deco nephrite jade and gem eight day clock, by Cartier. Photo Christie's Image Ltd 2012

The pierced jadeite jade dial over a kingfisher feather ground, with black enamel oriental design hands and coral centre, to the square nephrite jade case with applied gold Roman numerals and chamferd coral corner accents, to a gilt reverse and strutt support, 1931, 8.9cm long; Signed Cartier, no.2875. Price Realized £61,250

Christie's. Important Jewels. 12 December 2012. London, King Street