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Vintage diamond cluster ring. Horizontally set with three marquise shape old cut diamonds in open back rubover settings with a total weight of 0.40 carats, further set with twenty two round old cut diamonds in open back grain and claw settings with a total weight of 0.66 carats. The combined approximate diamond weight is 1.06 carats, to a graduating openwork cluster design with millegrain highlights, pierced gallery, fancy shaped backholing and on a tapered knife edge shank. Marked platinum and iridium, American, circa 1950.