Swiss verge watch in gold and enamel pair cases Circa 1760

Gold and enamel pair cased verge watch with portrait
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A Swiss verge in gold and enamel pair cases with portrait, circa 1760. Full plate fire gilt movement with pentagonal baluster pillars. Pierced and engraved masked cock, pierced and engraved foot and plate for the silver regulator disc. Fusee and chain with worm and wheel barrel set-up between the plates. Plain three arm gilt balance, blue steel spiral hairspring. Signed white enamel dial with Roman and Arabic numerals, decorative paste set hands. Plain gold inner case, gold pendant and bow. Gold outer case, the back decorated in polychrome enamel with an oval portrait of a lady within a foliate border. Paste set front bezel.
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Diameter: 41 mm
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Signed: Jn L Patron a Geneve