English gold watch with decorative translucent enamel Circa 1645

Exceptional gold and translucent enamel watch
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An English exceptional gold and translucent enamel pocket watch by Jas Rousseau, circa 1645. Gilded full plate movement, verge escapement, decoratively pierced and engraved screwed-on balance cock, flat steel balance, worm and wheel set-up, fusee and gut line, baluster pillars, movement signed Jas Rousseau, London. A champlevé enamel dial with translucent polychrome enamel flowers, white chapter ring with Roman numerals.
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Signed:  Jas Rousseau  London
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Later movement