Oscar Heyman Brothers sapphire and diamond ring. Set to centre with a horizontal row of eight square calibre cut natural unenhanced sapphires in open back channel settings with an approximate combined weight of 1.00 carat, flanked by two rows of square baguette cut diamonds in open back channel settings, all eighteen with an approximate combined weight of 1.00 carats, to a stepped three row band ring, with polished edges, a structured openwork gallery and intricate square backholing, the broad integrated shoulders tapering down to a solid stepped shank. Marked 18 carat yellow gold, maker's mark for Oscar Heyman Brothers, numbered '30844', American, circa 1970, accompanied by Oscar Heyman Brothers authenticity certificate.
