3327173 Pair of \'Convulvus Flower\' brooches, 1937 (sapphires, diamonds, platinum & gold) by Boivin, Rene (1864-1917); length: 6 cm; Private Collection; (add.info.: One designed as a calibre-cut sapphire convulvus (\'bindweed\') flower with pave-set diamond and minute cabochon sapphire detail, the other as a pave-set diamond bindweed flower with calibre-cut sapphire detail, each blossom is accompanied by a closed bud, with French assay marks for platinum and gold); Photo 穢 Christie\'s Images.