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AN ART DECO DIAMOND AND ONYX BOW BROOCH
Of openwork design, with old mine-cut diamonds and square-shaped cabochon onyx, to the circular-cut diamond centre, circa 1920, 5.7 cm. long, with French assay mark for platinum
Of openwork design, with old mine-cut diamonds and square-shaped cabochon onyx, to the circular-cut diamond centre, circa 1920, 5.7 cm. long, with French assay mark for platinum