Swiss 18K gold, enamel and pearl-set verge watch Circa 1790

Gold, enamel and pearl-set open faced verge probably Genève
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A fine and rare Swiss 18 carat gold, enamel and pearl-set open faced verge pocket watch, circa 1790. Hinged, gilt-brass full plate movement with turned pillars, fusee and chain, verge escapement with micrometric potence adjustment, plain brass three-arm balance, continental cock with polished steel endplate, silvered regulation dial. White enamel dial with Arabic numerals, outer minute divisions and Arabic fifteen-minute numerals, later gilt fancy hands. Louis XVI case, the back finely painted on enamel depicting Rinaldo & Armida flanking a white, gold and blue paillon urn in a landscape, Royal blue guilloché background, pearl-set border and bezel, engraved band.
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Diameter: 49.5 mm
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Signed: No name