Tiffany & Co. diamond eternity ring. Set with thirty three round brilliant cut diamonds in open back rubover settings with a combined approximate weight of 0.66 carats, to a smoothly conforming full eternity band with fine borders and square pierced backholing, approximately 2.5mm in width. Marked platinum and iridium, signed 'TIFFANY & CO', numbered '11246', American, circa 1970.