Tank" ring in smooth 18K (750/oo) yellow gold and platinum (850/oo) for the settings, the geometrically decorated top centred on a brilliant-cut diamond weighing approximately 0.75 ct (including the stone) in a surround of smaller old-cut and 8x8-cut diamonds (tiny chips). French work, circa 1945. TDD 52 - Gross weight: 9.8 g. CM