Swiss 18k gold repeater with concealed erotic automaton Circa 1820

Gold open faced verge pocket watch
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A fine and very rare Swiss, quarter repeating, 18K gold pocket watch with concealed erotic automaton, circa 1820. An Empire case, engine-turned back with small cartouche, reeded band, polished bezel. Gilt metal cuvette hinged to the movement ring and with central small concealed spring-loaded cover opening by depressing a pin at the edge to reveal a multicoloured engraved gold officer and a lady in an amorous upright position, animated by the action of the repeating mechanism.
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White enamel dial, Breguet numerals, outer minute track, winding aperture at 2 o’clock. Gold skeleton spear hands. A frosted gilt, full-plate movement with cylindrical pillars, fusee and chain, verge escapement, three-arm brass balance with flat balance spring, continental cock, silver regulation dial, repeating on gongs activated by depressing the pendant.
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Diameter: 54 mm
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Signed: No Name