18 Karat gold, platinum and diamond necklace, David Webb. Photo Sotheby's. 

The bib-style necklace designed as a meandering flowering vine, decorated with stylized acorns, set with numerous round diamonds weighing approximately 24.50 carats, gross weight approximately 154 dwts, length 17 inches, signed Webb; with two detachable links measuring 1 inch each; also accompanied by three additional links, gross weight approximately 5 dwts, length 2 inches, signed Webb; circa 1973; together with an 18 karat gold tiara fitting, gross weight approximately 38 dwts, with maker's mark for Carvin French. Estimation 90,000 — 120,000 USD

Accompanied by a Certificate of Authenticity from David Webb.

Sotheby's. Magnificent Jewels.New York | 11 déc. 2013 - www.sothebys.com