Swiss gilt-brass and enamel specially made watch Circa 1800

Gilt-brass and enamel open faced watch with moon phase
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A Swiss gilt-brass and enamel pocket watch, probably specially made, circa 1800 Full plate gilt fusee and chain verge movement, plain balance cock with an engraved foot.
White enamel eccentric dial with Arabic numerals, aperture for winding at eight o’clock, decorative hands.
Gilt-brass case, the case back with a painted enamel couple in love in a garden. Movement signed Coulin Geneve, case signed Leton.
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Diameter: 56,5 mm
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Weight: 136 g
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Signed: Coulin Geneve
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Reference 013000