Once belonging to the exquisite collection of Helene Beaumont, this Art Deco necklace of diamonds and cabochon emeralds would have been worn to parties on the Côte d’Azur with the Duke and Duchess of Windsor and the Aga Khan. Discover why Sotheby’s Worldwide Chairman for Jewellery, David Bennett, thinks it’s the most beautiful row of emeralds he has ever seen.This incomparable necklace is a highlight of our upcoming sale, Magnificent Jewels and Noble Jewels (14 May | Geneva). Click here to watch more videos.