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Diamond cluster ring by Hammerman Brothers. To the centre is a raised platinum dome set with forty eight round brilliant cut diamonds of varying sizes with a combined approximate weight of 4.50 carats, grain set with intricate honeycomb back holing, encased in a basket of worked gold extending to a conforming finger gallery and down the shoulders to a heavy solid ribbed shank. Marked 18 carat and platinum, numbered 32 and 81546, with maker's mark 'HB', American, circa 1960.