Swiss gold open faced quarter repeating watch Circa 1900

Yellow gold quarter repeating watch by Vacheron & Constantin
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A yellow gold open faced quarter repeating keyless watch with enamel dial, retailed by Ch. Dubret, Dijon, Fabriqué à Genève, circa 1900. Manual winding movement, two hammers repeating on two gongs.
White enamel dial, Arabic numeral, subsidiary seconds, 18k yellow gold hinged case, engraved soleil case back, cuvette inscribed with “Alexis Chanson”, quarter repeating slide to the band. case, dial, cuvette and movement signed.
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Diameter: 52 mm
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Signed: Vacheron & Constantin Genève