English 18 carat gold and enamel verge pocket watch Circa 1800

Gold open faced pocket watch
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An English 18 carat gold and enamel verge pocket watch, circa 1800. Gilt full plate jewelled English lever chain fusee, plain brass 3 arm balance, pierced and engraved balance cock with grimacing mask, diamond endstone.
White enamel dial, black Arabic numerals, outer minute divisions, winding aperture above 6, gilt beetle and poker hands.
Hinged consular form case, back with blue Guilloche enamel, front and back bezels with similar blue enamel and white enamel dots. Signed movement.
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Diameter: 43 mm
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Signed: Charles Green
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With key