Platinum and diamond 'Cinq Plans' ring, René Boivin. Photo Sotheby's

Of sculpted design, centering a row of old European-cut diamonds weighing approximately 1.25 carats, size 8; circa 1935. Estimate 7,500 — 10,000 USD 

Accompanied by a Certificate of Authenticity from Françoise Cailles.

Sotheby's. Magnificent Jewels, New York | 29 Apr 2014 - www.sothebys.com