An Art Decosapphire and diamond oval plaque ring; featuring a central old European-cut diamond, in the centre of a decorative openwork cluster of round brilliant and Edwardian-cut diamonds, in millegrain edged rub over and grain settings, superimposed on a surround of invisibly set calibré-cut sapphires, with an eight-cut diamond set in each shoulder. Mounted in platinum, with a scroll pierced gallery below. Circa 1990.