Ring watch: unusual historical ring watch set with diamonds, France, c. 1860

Ca. 35 x 18 mm, ring diameter 20 mm, RG64, gold and silver, French 18K gold hallmark, set with diamonds all round, 18K gold case with hinged back, extremely flat cylinder movement, view of the diamond-set balance wheel, central dial in green engine-turned enamel, gold hands, in very fine condition, movement intact. The design of the balance wheel suggests that Piguet & Capt and their successors were the movement manufacturers (https://www.cortrie.de/go/ld3).

Estimation:-

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