160. PEARL AND DIAMOND RING Set in the centre with an old-cut diamond flanked by two white and grey pearls, accented with old-cut and 8/8-cut diamonds, French hallmark for platinum (850°/00), circumference of finger 55, gross weight 19.50 g. PEARL AND DIAMOND RING Set to the centre with an old brilliant-cut diamond, between two pearls of white and grey tint, the gallery and shoulders set with old brilliant and single-cut diamonds, French import mark for platinum, ring size O, gross weight 19.50 grams.