Art Deco diamond solitaire ring. Set to centre with a round old cut diamond in a open back claw setting, with an approximate weight of 0.52 carats, to an elegant solitaire design featuring curved claws, a pierced open gallery and circular open back holing, flanked by raised inwardly tapering shoulders with chenier detail, flowing through to a solid D-shape shank. Shank tested white gold, marked platinum, makers mark 'D & S' for Deakin & Francis, indistinct mark, circa 1920.