French watch with miniature painting and Chatelaine Circa 1770

Gold and enamel pocket watch by Ferdinand Berthoud
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A rare French gold/enamel verge pocket watch with finest miniature painting and matched gold/enamel Chatelaine, circa 1770.
18 carat gold case with high quality 5-part hinge and enamel painting on back; signed verge movement; enamel dial with Roman hours, Arabic minutes, original gold hour hand and replaced minute hand; corresponding gold chatelaine, enameled and decorated with miniature pearls.(steel shaft missing)
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Diameter: 41 mm
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Weight: 52 g
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Signed: Ferdinand Berthoud Paris