Cartier diamond full eternity ring. Set with twenty two round brilliant cut diamonds in open back grain and half rubover settings with a combined approximate weight of 1.55 carats, to a smoothly conforming full eternity band featuring polished edges, a stylised gallery and rectangular open backholing, approximately 3.9 mm in width. Marked 18 carat yellow and white gold, signed 'Cartier', numbered '909728', circa 1970.