Lot 556 , A Retro gold and synthetic spinel ring, France, circa 1935

A Retro gold and synthetic spinel ring, France, circa 1935, collet-set with a square step-cut synthetic blue spinel measuring approximately 9.2 x 9.2mm, in a geometric 'Tank' style ring in gold, size L, French maker's mark, possibly CO with recumbent lion, gross weight approximately 15 grams
£1,000-1,500

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