Swiss quarter repeater with erotic automaton Circa 1790

Gold quarter repeating watch with concealed erotic automaton
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A Swiss pink gold quarter repeating open faced watch with concealed erotic automaton, circa 1790.
Gilt full plate movement with cylindrical pillars, fusee and chain, verge escapement, plain three armed balance, pierced and engraved balance bridge, two hammers quarter repeating on two gongs, the erotic automaton concealed on top of the yellow gold cuvette depicting a couple in flagrant.
White enamel dial with Arabic numerals. Guilloché case, a slide to the milled band for locking the repeating system. Cuvette numbered.
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Diameter: 55 mm
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Signed: No name