French 20K gold, enamel and pearl-set verge watch Circa 1770

Gold, enamel and pearl-set open faced verge by Henry Voisin
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A fine French 20 carat gold, enamel and pearl-set verge pocket watch, circa 1770. Verge movement. White enamel dial with Black Arabic hours and red Arabic quarter-hours, probably original gold hands. Case with five-part Louis XV hinge, enamelled on both sides, rim decorated with green leaves and white pearls (some missing), the back engine-turned, covered with translucent blue enamel, a multi-coloured enamel ornament in the centre. Case numbered, dial and movement signed and numbered.
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Diameter: 40 mm
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Weight: 48 g
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Signed: Henry Voisin à Paris
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In 1760 Henry Voisin took over the business of his father, the watchmaker Charles Voisin (1685-1761). His real name was Antoine-Henry Voisin. However, he signed his movements only with his second first name “Henry Voisin”.
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The case and dial of this watch are very typical of the work of Henry Voisin. There are several watches known, which were signed by him and which have both the enamelled pearl rim and the very special enamel dial.