Art Deco Jade, Platinum and Diamond Pendant-Watch, Boucheron, with Platinum, Diamond and Black Cord Necklace. Photo courtesy Doyle New York.

The fine black cord with diamond-set terminals suspending a circular jade pendant centering a circular silver-tone guilloche dial, encircled by rose-cut diamonds, joined by rose-cut diamond-set caps and pendant loops, the reverse with a circular silver-tone guilloche panel encircled by rose-cut diamonds, dial signed Boucheron, circa 1920. Length 25 1/2 inches. Estimate $3,000-5,000 

Estate of a New York Collector 

Doyle New York. Important Jewelry. Wednesday, September 25, 2013 at 10am - http://www.doylenewyork.com