French oignon watch in a silver open faced case Circa 1695

Oignon with enamel dial in a silver case
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A French verge oignon with enamel dial in a silver case, circa 1695. Full plate fire gilt fusee movement, Egyptian pillars, pierced and engraved cock with animals, birds, masks and foliage, three-arm steel balance with spiral blue steel hairspring. Small silver regulator index. Enamel dial set with large blue Roman numerals, inside ring marked for the hours and quarters. Wound through the single-handed enamel dial, the hand has a special system so you can push it forward and backwards, the pressure you need to do that stays the same always. Deep gilt metal case, back chased and engraved, depicting Leda and the Swan surrounded by foliage.
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Diameter: 57 mm
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Weight: 177 g
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Signed: Meironne à Lancy 

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Leda is a figure from Greek mythology. She is the wife of the Spartan king Tyndareus. Leda is known by the story of Leda and the Swan. Zeus was in love with her, but could not convince here to have intercourse, he turned himself into a swan and overwhelmed Leda. Ashamed of what had happened, Leda had intercourse with her husband that night and after nine months they had children, who came from an egg according to some traditions. Pollux and Helen were the children of Zeus, Castor, and Clytemnestra of Tyndaeros.
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Meyronne
Alexandre Meyronne (sometimes spelled Meyranne or Meronne), and he worked around 1695–1735 in Lancy, a place near Geneva.
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Reference 014000