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ENAMEL AND DIAMOND RING A domed ring covered in blue enamel and set with an old-cut diamond weighing approximately 2.50 carats, bearing a French import hallmark for 18-karat gold (750 ‰), ring size 49, gross weight 11.5 g. ENAMEL AND DIAMOND RING This bombé-style ring is set with blue enamel and features an old-cut diamond weighing approximately 2.50 carats at its center; it bears the French import hallmark for 18-karat gold, ring size J, gross weight 11.5 grams. For further information on this lot, please visit Bonhams.com