Collet-set with a cabochon opal, the bezel and shoulders decorated with beaded motifs, size L, signed René Boivin, French assay and maker's marks, case stamped René Boivin.

Cf: Françoise Cailles, René Boivin Joaillier, Les Éditions de l'Amateur, Paris, 1994, page 45 for the drawing and image of a similar ring dated 1913/1917.

Accompanied by a certificate from Françoise Cailles. Stamped with French assay marks for 18 carat gold and maker's marks. Minor abrasions consistent with wear. Opal with green blue colour with minor abrasions to surface, measuring approximately 19.4 x 15 x 5mm. Overall good condition.
"In response to your inquiry, we are pleased to provide you with a general report of the condition of the property described above. Please note that colour, clarity and weight of gemstones are statements of opinion only and not statements of fact by Sotheby's. We do not guarantee, and are not responsible for any certificate from a gemological laboratory that may accompany the property. We do not guarantee that watches are in working order. Prospective buyers should inspect each lot to satisfy themselves as to condition and must understand that any statement made by Sotheby's is merely a subjective, qualified opinion. Prospective buyers should also refer to refer to any Important Notices regarding this sale, which are printed in the Sale Catalogue, in particular to the Notice regarding the treatment and condition of gemstones and to the Notice regarding import of Burmese jadeite and rubies into the US.
NOTWITHSTANDING THIS REPORT OR ANY DISCUSSIONS CONCERNING A LOT, ALL LOTS ARE OFFERED AND SOLD "AS IS" IN ACCORDANCE WITH THE CONDITIONS OF BUSINESS PRINTED IN THE SALE CATALOGUE."

Accompanied by a certificate from Françoise Cailles.