Decorative Swiss 18 carat gold cylinder watch Circa 1850

Fine decorative gold watch
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A fine and rare unsigned Swiss keywind, 18K yellow gold, enamel and pearl-set pendant watch with cylinder escapement movement, around 1850. Gilt, bar movement, cylinder escapement, brass three-arm balance, flat balance spring, index regulator.
Case surrounded by filigree, pearls and enamel strips, case back cover decorated with a painted on enamel girl with her dog in the garden.
White enamel dial with radial Arabic numerals, outer minute track. Gilt arrow hands.
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Dimensions: 57 x 67 mm
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Signed: No name, Probably Swiss