Fine and rare 18 carat gold and enamel Swiss watch Circa 1820

Fine yellow gold and enamel Swiss pocket watch
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A very fine and rare 18 carat yellow gold and enamel Swiss pocket watch. Made by Vacheron, Genève, circa 1820.
Four-body polished case, the back finely engraved and set with blue and white enamel decorations. Hinged gold cuvette.
White enamel dial with radial Roman numerals, outer minute track and gilt split Louis XV hands.
Frosted gilt movement, 2 jewels, cylinder escapement, brass balance, blued steel flat balance spring and an index regulator.
Cuvette signed.
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Diameter: 38 mm
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Signed: Vacheron Constantin, Genève