Decorative Swiss gold, enamel and pearl set verge Circa 1800

Gold open faced verge watch by Ferdinand Berthoud
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A decorative Swiss 18 carat gold, enamel and pearl set open faced verge watch, circa 1800. Gilt finished verge movement, chain fusée, finely pierced and engraved balance cock. White enamel dial with Arabic numerals and gold arrow hands. Case with pearl set bezel and rim, the reverse with translucent royal blue enamel over engine turned background, centred by polychrome champlevé enamel vase with flowers surrounded by a wreath. Comes with later gilt metal chain and gilt metal and agate seal. Dial and movement signed.
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Diameter: 51.5 mm
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Signed: Ferdinand Berthoud