Antique "Toi et Moi" ring in 18K (750°/°°) gold and platinum (850°/°°) with a sinuous cross design set with lines of rose-cut diamonds (two later imitation white stones at the end of the lines) and centred on a cushion sapphire (edges worn) and a crown-cut rose-cut diamond. Hallmarked "Tête de Cheval", circa 1905, Master-smith: "P..."? TDD 49 - Gross weight: 2.8 g