Swiss gold verge pocket watch with windmill automaton Circa 1800

Gold, enamel and pearl-set pocket watch
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A very fine and rare Swiss, 18K gold, polychrome enamel and pearl-set pocket watch with windmill automaton, circa 1800. Le Moulin d’Or by Louis Duchène & Fils, Genève. An Empire case, hinged seed pearl-set bezels, the band decorated with white, black, blue and gold champlevé enamel, glazed hinged back with seed pearl-set border, finely painted Geneva enamel and engraved gold alpine scene of figures walking along a track, engraved gold windmill and tree with blue paillon detail, the windmill with rotating sails directly driven from the contrate wheel pivot.
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White enamel dial, Breguet numerals, outer gold-painted minute track, winding aperture at 11 o’clock. Gold Breguet hands. A frosted gilt full plate movement with flared turned pillars, fusee and chain, verge escapement with micrometric potence adjustment, three-arm brass balance, flat balance spring, the upper pivot of the contrate wheel extended through the back of the case to power the windmill sails, pierced and chased continental balance cock, polished steel endplate, silver regulator dial. Movement signed.
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Diameter: 47 mm
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Signed: Louis Duchène & Fils  Genève
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The case lacks elements.
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Louis Duchène & Fils: Recorded from about 1791 to about 1820, they are known for coach watches with grande and petite sonnerie and calendar, repeating the minutes and quarters, watches with champlevé enamel and fantasie watches.