Oscar Heyman Brothers diamond cluster ring, American, circa 1970.
Oscar Heyman Brothers diamond cluster ring. Set with thirty seven round brilliant cut diamonds in open back grain settings with an approximate combined weight of 1.22 carats, to a bold three row design with polished edges and intricate honeycomb open backholing, the broad integrated shoulders flow through to a solid tapering D-shape shank. Marked platinum and iridium, maker's mark for Oscar Heyman Brothers, numbered 'W3235', American, circa 1970.