Oscar Heyman diamond full eternity band, circa 1970.
Oscar Heyman diamond full eternity band. Set with nine round brilliant cut diamonds alternated by nine rectangular baguette cut diamonds in open back rubover settings with a combined approximate weight of 1.35 carats, to an impressive linear full eternity band with polished edges, a smooth gallery and fancy open backholing, approximately 3.0mm in width. Marked platinum, numbered 'W1897', maker's mark for Oscar Heyman, American, circa 1970.