Swiss gilt-metal verge with concealed erotic scene Circa 1780

Gold open faced verge pocket watch 
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A Swiss gilt metal and painted on enamel pocket watch with a concealed erotic scene, circa 1780. The Temptations of the Flesh, Swiss. A polished case, the back cover opening to reveal the erotic scene depicting a seated monk and a lady in a compromising position. White enamel dial with Arabic numerals, outer minute divisions, winding aperture at 2. Gilt Louis hands. A matte gilt full-plate movement, fusee and chain, pentagonal baluster pillars, verge escapement with micrometric potence adjustment, three-arm brass balance, flat balance spring, continental balance cock with polished steel endplate, silvered regulation dial. Case punched “Leton”.
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Diameter: 51 mm
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Signed: No Name
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The case has slightly restored soft enamel, the dial is chipped.