Oscar Heyman Brothers diamond eternity ring. Set with thirty seven round brilliant cut diamonds in open back grain settings with a combined approximate weight of 1.23 carats, to a smoothly conforming triple row half eternity band with polished edges and intricate open backholing, approximately 7mm in width. Marked platinum and iridium, makers mark for Oscar Heyman Brothers, numbered 'W3030', American, circa 1970.
