French 18 carat gold with engine turned silver dial Circa 1825

Very rare caliber gold open faced pocket watch
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An interesting, early French watch with pivoted detent escapement, circa 1825.
An 18 carat pink gold, punched I 6535, Paris 18 carat gold hallmark 1819 – 1838, very fine and unusual caliber with detent escapement, engine turned silver dial, fine Breguet steel hands.
Technically highly interesting, outstanding condition.
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Diameter: 53 mm
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Weight: 85 g
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Signed: No Name