French 18k gold watch with translucent blue enamel Circa 1785

Gold open faced verge watch
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A fine French, large and slim, 18K gold with enamel pocket watch, circa 1785. The bezel with translucent blue enamel and gold pailon decoration, the back decorated with a fine Royal blue guilloché enamel panel decorated with an en grisaille classical scene, gold paillon and white enamel border decorated to match the bezel.
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White enamel dial with radial Arabic numerals, outer dot minute track with Arabic five minute numerals. Gold fleur de lis hands. Hinged gilt brass full plate, fusee with chain secured by a shaped bridge, verge escapement, gilt brass pierced and engraved continental cock with polished steel end-piece, index regulator. Dial and movement signed.
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Diameter: 57 mm
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Signed: André Hessen a Paris
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André Hessen worked in Paris between 1775 and 1791.