French 18k gold quarter repeating verge watch Circa 1800

Gold verge repeating on a bell and with lever for à toc option by Besancenet
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A fine, rare French 18 carat gold open faced verge pocket watch quarter repeating on a bell and with lever for à toc option, circa 1800. Matte gilt dial, cylindrical pillars, fusee and chain, verge escapement, three armed brass balance, flat balance spring, pierced and engraved foliate continental balance cock, polished steel end plate, silver regulation dial, repeating on a bell in the back of the case activated by depressing the pendant, slide for bell or à toc repeating selection under the bezel at 6 o’clock. Hinged and sprung gilt metal cuvette. White enamel dial with Arabic numerals, outer star minute divisions and Arabic fifteen minute numerals, signature with gilt border, original gold Directoire hands. Polished case, engraved foliage around the band. Dial and cuvette signed.
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Diameter: 54 mm
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Signed: Besancenet à Paris
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This watch has the very unusual feature of a slide for selecting either repeating on a bell or à toc (dumb).