Two emerald and diamond rings, René Boivin, 1950s. Estimate 13,000 — 18,000 GBP. Photo Sotheby's

Each of bombé design, respectively set to the centre with a heart-shaped emerald and diamond, further set with circular-cut emeralds and similarly and single-cut diamonds, each size H, signed René Boivin, French assay and partial maker's marks, case stamped René Boivin.

Bibliography: Cf: Françoise Cailles, René Boivin Joaillier, Les Éditions de l'Amateur, Paris, 1994, page 169 for an illustration of these rings, specifying that the model dates from 1934.

Accompanied by a certificate from Françoise Cailles.

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