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Diamondcluster ring. Set with a round old cut diamond to centre in an open backrubover setting with an approximate weight of 0.65 carats, further set with two round old cut diamonds in open back grain settings with a combined weight of 0.10 carats, further adorned with twenty eight round eight cut diamonds in open back grain settings with a combined weight of 0.55 carats. The total approximate diamond weight is 1.30 carats, to a tapered bombé cluster design featuring millegrain edging, an intricately pierced collet and fancy shape open backholing flanked by tapering openwork shoulders with cheniers flowing down to a solid lightly rounded shank. Markedplatinum, maker's mark 'KJ', assay mark for Vienna, Austrian, circa 1925.