Swiss 18K gold centre seconds cylinder watch Circa 1840

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A decorative Swiss 18 carat gold open faced cylinder pocket watch with independent centre seconds, circa 1840. Keywind gilt bar movement with two suspended going barrels, the larger for the going train the other for the independent seconds, plain cock with polished steel regulator, plain balance with blue steel spiral hairspring, ruby cylinder and steel escape wheel. White enamel dial with Roman hours and outer minute divisions, centre seconds and blue steel hands. Slim case with ribbed middle, small gold slide to operate the independent second’s train, chased and engraved bezels, pendant and bow, the back engraved with a decorative cartouche. Gold cuvette covered in decorative engraving and inscribed Secondes Independantes Echappement a cylinder a Pierre Quatorze trous en Rubis.
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Diameter: 46 mm
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Signed: No name