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Lot n° 145

Openwork platinum (950‰) "Tourbillon" ring set...

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Openwork platinum (950‰) "Tourbillon" ring set with an oval sapphire, surrounded by alignments of brilliant-cut diamonds. French work, circa 1950. Sapphire weight (weighed): 3.5 carats. Finger size: 50. Diameter: 1.8 cm. Gross weight: 9.9 g.