Swiss 18K pink gold key winding pendant watch Circa 1881

Gold open faced cylinder watch
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A Swiss 18 carat pink gold open faced key winding pendant watch by Vacheron Constantin, Geneva, circa 1881. An engine turned caseback, with, in the center, an escutcheon. Fine engraving on the Cuvette; Louise Melly / 1881. White enamel dial with radial Roman numerals, outside minute track, and yellow gold Pear hands. Movement with a cylinder escapement. The case and movement are signed.
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Diameter: 31 mm
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Signed: Vacheron Constantin  Geneva
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Accompanied by a fitted box and a winding key.