Platinum and diamond clip-brooch, Cartier, circa 1925.  Photo Sotheby's

Of openwork geometric design set in the center with 2 old European-cut diamonds weighing 6.07 and 5.99 carats, further set with baguette and old European-cut diamonds weighing approximately 5.95 carats, signed Cartier, numbered 37-16799.

Lot 393. ESTIMATION 175,000-225,000 USD

Sotheby's. Magnificent Jewels. New York | 18 avr. 2012, 10:00 AM www.sothebys.com