Swiss yellow gold and enamel open-faced watch Circa 1850

Yellow gold and enamel watch
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A Swiss yellow gold and enamel open-faced watch, circa 1850, cylinder movement, mono-metallic balance, yellow gold cuvette.
White dial, Roman numerals, outer minute track.
18k Yellow gold case, case back with polychrome enamel depicting the head of a putto, both bezels similarly decorated with blue enamel, dial and cuvette signed.
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Diameter: 42 mm
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Signed: Malignon Genève