French gold verge watch with ballooning scene Circa 1790

Gold and enamel pocket watch with a rare ballooning scene
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A French 18 carat gold and enamel open faced verge watch with a rare ballooning scene, circa 1790. Full plate gilt fusee movement, finely pierced and engraved bridge cock with steel coqueret, plain three armed gilt balance with blue steel spiral hairspring, silver regulator dial with gilt indicator, round pillars. Winding through the white enamel dial with Roman and Arabic numerals, gilt hands. Small consular case with a polychrome enamel scene on the back of a balloon over an Alpine lake.
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Diameter: 33 mm
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Signed: No name
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A rare subject decorating a watch case. The first manned balloon flight took place in Paris, 1783.