French 18k gold and enamel pair-cased pendant watch Circa 1785

Gold pearl-set verge pendant watch
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A fine and unusual French, 18k gold and enamel, pearl-set, pair-cased pendant watch, circa 1785. Protective outer case, glazed gilt brass. Louis XVI inner case, the back with translucent imperial blue enamel with white vermicelli over engine-turning, pearl-set bezels.

White enamel dial, radial Roman numerals, outer minute divisions with five-minute Arabic numerals, winding aperture at 2. Gold beetle and poker hands. Hinged, frosted gilt full-plate movement with cylindrical pillars, fusee and chain, verge escapement brass balance with flat balance spring, continental type balance cock. Movement signed, case punched with French guarantee marks.
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Diameter: 34 mm
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Signed: Quesnel Duv à Rouen
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Lacking dial elements