Signet ring in 750‰ yellow gold and 950‰ platinum, known as a “Tank,”

Signet ring in 750‰ yellow gold and 950‰ platinum, known as a “Tank,” consisting of a half-shank set with a natural, unheated sapphire (with surface scratches) on square prongs, surmounting a double bridge set with two rows of old-cut diamonds. French craftsmanship, circa 1940. Sapphire weight: approximately 5.5 cts. Gross weight: 13.8 g; TDD: 55.5.

Stima:€2,000

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