Art Deco diamond cocktail ring. Set with twenty six round old cut diamonds in open back grain settings with a total weight of 0.80 carats, further set with eight rectangular baguette cut diamonds in open back rubover channel settings with a total weight of 0.40 carats. The combined approximate diamond weight is 1.20 carats, to a bombé cluster with pierced backholing, the broad shoulders leading through to a tapering shank. Tested platinum, circa 1935.