A Belle Epoque enamel and agate desk clock, by Cartier.  Photo Christie's Image Ltd 2013

The rectangular case paneled in pink opaline guilloché enamel, with winding holes to the rear, on stepped and agate base, the circular dial with white enamel beaded work on the bezel, painted Arabic numerals and diamond-set hands, with winding key, circa 1910, 7.5 x 5.9 x 5.0 cm, in red leather fitted Cartier travel case. Dial signed Cartier. Estimate CHF15,000 – CHF25,000

Christie's. MAGNIFICENT JEWELS. 15 May 2013. Geneva