French 18 carat gold verge watch with erotic scene Circa 1775

Gold verge watch
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French 18 carat gold key wind open faced pocket watch with concealed erotic scene, circa 1750. Gilt full plate converted Swiss lever, pierced and engraved bridge cock with steel polished coqueret, three arm balance.
White enamel dial with black Roman numerals, and black outer minute track, winding aperture at 2 o’clock, gilt fancy hands.
Polished consular case with applied three colour gold decoration to reverse depicting a basket of flowers, concealed erotic scene to the cuvette.
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Diameter: 38 mm
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Signed: Denis à Paris
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Hairlines.