Belgian decorative gold and enamel verge pocket watch Circa 1790

Gold enamel verge pocket watch by Hubert Sarton
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A highly attractive Belgian gentleman’s pocket watch with translucent cobalt blue enamel over sun ray engine-turned ground, gold paillon flower bezels and a centred rose-cut diamond-set rosette, circa 1790.
The enamel case is made of 18-carat gold, the white signed enamel dial has radial Arabic numerals and gold hands, and the movement is a full plate movement, keywind, and with a chain/fusee and a three-arm steel ring balance.
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Diameter: 43 mm
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Weight: 66 g
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Signed: Humbert Sarton à Liège