Black Onyx, Mother-of-Pearl, Rock Crystal and Gilt Metal Sunburst Clock, Cartier, Paris. Photo Doyle

Quartz, the rectangular black onyx base edged with polished gilt metal, surmounted by two carved sloped rock crystal panels with scalloped edge, framed in polished gilt metal, supporting a large circular dial fashioned of radiating tapered panels of inlaid mother-of-pearl, with gilt metal hands, encircled by gilt metal, within black onyx, diameter approximately 5 inches, case signed Cartier, Paris, Made in France, no. 200643. 6 1/4 x 7 1/2 x 2 1/4 inches. With signed fitted box. Estimate $15,000-20,000

Doyle New York. Important Jewelry - Monday, April 15, 2013 at 10am. http://www.doylenewyork.com