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Sapphire and diamond ring, Oscar Heyman & Brothers,  circa 1950

The modified rectangular panel set with 6 calf's-head cut sapphires weighing approximately 12.00 carats, framing a square emerald-cut sapphire weighing approximately 6.75 carats, quartered by clusters of 14 small round diamonds weighing approximately 1.00 carat, mounted in platinum, numbered 50169. Estimate 5,000—7,000 USD

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Sotheby's. Important Jewels. 04 Feb 09. New York www.sothebys.com photo courtesy Sotheby's