Swiss verge with visible skeletonized movement Circa 1820

Gold open faced skeletonized verge by Houriet & Fils
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A very fine Swiss 18 carat gold open faced verge pocket watch with visible skeletonized movement, circa 1820. Gilt brass skeletonized movement, cylindrical pillars, fusee and chain, verge escapement, plain brass three armed balance with flat balance spring, index regulator. Annular white enamel dial with Breguet numerals and outer minute divisions, the centre exposing the skeletonized going train, partially replaced blued steel lozenge hands. Plain case, reeded band. Dial and movement signed, case numbered.
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Diameter: 53 mm
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Signed: Houriet et Fils 
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Jacques-Frédéric Houriet (1743-1830). After a stay of nine years in Paris for work and study, Houriet settled in Le Locle, where he became an important horologist, working with his son and many other members of his immediate and extended family.