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

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