Oscar Heyman diamond full eternity band. Set with twenty one rectangular step cut diamonds in open back rubover settings with a combined approximate weight of 3.55 carats, to an impressive linear full eternity band with polished edges, a smooth gallery and open square backholing, approximately 3.8mm in width. Marked platinum and tested iridium, numbered 'J3335', maker's mark for Oscar Heyman, American, circa 1970.
