Swiss silver open faced verge with automaton Circa 1800

Unsigned silver verge with enamelled Adam & Eve automaton
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A rare, exceptionally large Swiss verge pocket watch with enamelled Adam & Eve automaton, circa 1820.
Gilt full plate movement, verge escapement. Decentral dial, a lower part white, the upper half with enamel painting, and a representation of various animals, in the centre the rare seconds’ indication in form of an automaton, a rotating enamel portrait of Adam and Eve with outer seconds scale and the snake as seconds hand, blued Breguet hands. Silver, engine turned case, No.3185.
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Diameter: 63.5 mm
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Weight: 143 g
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Unsigned.
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So far knowledge this is the largest known Adam & Eve automaton, the usual size is Ø50-55mm.