Magnificent Diamond necklace/bracelet, Harry Winston, circa 1975 The front set with eleven marquise-shaped diamonds weighing respectively 1.70, 1.97, 1.98, 2.27, 2.79, 2.94, 4.26, 4.36, 4.14, 4.51 and 6.09 carats, alternating with clusters of pear-shaped,...