'Chevalière' ring, René Boivin, 1951. Estimate 3,500 — 4,500 GBP. Photo Sotheby's

Designed as a polished wooden shank decorated to the front with a panther motif, size K1/2, signed René Boivin. 

Bibliography: Cf: Françoise Cailles, René Boivin Joaillier, Les Éditions de l'Amateur, Paris, 1994, page 135 for an illustration of this ring and stating that the model is from 1933.

Accompanied by a certificate from Françoise Cailles.

Sotheby's. Fine Jewels, London, 1 dec. 2015, 10:00 AM