Fine Swiss pocket watch with independent erotic automaton Circa 1910

Gold keyless pocket watch with concealed erotic automaton
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Fine, 18 Carat gold keyless pocket watch with concealed independent erotic automaton. Made in Switzerland Circa 1910.
Five body, bassine and polished case. A hinged cuvette with a hinged gold cover concealing the varicoloured metal erotic automaton depicting a couple in an interior, the automaton is powered by the opening and closing of the cuvette cover.
White enamel dial with radial Roman numerals, outer minute track with Arabic five-minute numerals, subsidiary seconds. Fancy gilt hands.
Matte gilt movement with 15 jewels, straight-line lever escapement, notched bimetallic compensation balance, blued steel flat balance spring and an index regulator.
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Diameter: 49.5 mm
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Signed: None
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The automaton scene is unusually not driven by the watch movement but independently powered by the action of opening and closing the cover concealing it. This is reminiscent of the ‘remontoire perpétuel à décrochement’ keyless cover winding first patented by Haas Neveux in 1873.