Vintage sapphire and diamond ring by Oscar Heyman Brothers. Set horizontally with nine natural unenhanced sapphires in an open back rubover and channel setting with an approximate combined weight of 1.50 carats, further set with two curving rows of round brilliant cut diamonds in open back grain and rubover settings, sixteen in total with a combined approximate weight of 0.80 carats, to a swirling openwork design with scalloped edging, a finely pierced gallery featuring the Oscar Heyman Brothers signature dot and dash engraving, and fancy open backholing, the smoothly conforming shoulders flowing down to a solid D-shape shank. Marked 18 carat yellow gold, maker's mark for Oscar Heyman Brothers, numbered '25246', American, circa 1970.
