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A SAPPHIRE AND DIAMOND RING, BY RENE BOIVIN
Set with a cut-cornered rectangular-cut sapphire, flanked on either side by five collet-set old mine-cut diamonds, mounted in platinum, circa 1955, with French assay mark, in a René Boivin brown suede box
By René Boivin
With a letter dated 16 December 2009 from Francoise cailles, attesting that this ring is the work of René Boivin
Set with a cut-cornered rectangular-cut sapphire, flanked on either side by five collet-set old mine-cut diamonds, mounted in platinum, circa 1955, with French assay mark, in a René Boivin brown suede box
By René Boivin
With a letter dated 16 December 2009 from Francoise cailles, attesting that this ring is the work of René Boivin