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Three stone diamond ring. Set horizontally with one round old cut diamond in an open back grain setting with a weight of 0.65 carats and two round old cut diamonds in similar settings with a combined weight of 1.00 carats. The total approximate diamond weight is 1.65 carats, to a rectangular collet setting with millegrain border, a finely pierced geometric gallery with open backholing and shoulders with intricate engraved patterning and leading through to a solid tapering flat shank. Marked platinum, circa 1930.