RENÉ BOIVIN after Suzanne Belperron Clou" brooch in platinum and 18K (750) gold, geometric composition adorned with an oval synthetic sapphire, set with calibrated sapphires, the ends paved with round old-cut diamonds. Unsigned. French work, 1930s. Height: approx. 2.6cm. Gross weight: 9.7g The brooch is accompanied by a Boivin certificate of authenticity (2024) attesting: original creation by René Boivin circa 1930 after a design by Suzanne Belperron. A René Boivin brooch