French gold and enamel open faced verge watch Circa 1785

Pink gold and enamel verge watch
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A French pink gold and enamel open faced verge watch, circa 1785, gilt full plate movement, pierced and engraved balance bridge.
White enamel dial, Arabic numerals, case back with polychrome enamel depicting two classical figures on a blue translucent enamel background, dial and movement signed Delorme à Paris
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Diameter: 50 mm
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Signed: Delorme Paris