Swiss miniature fob watch in the shape of a mandolin Circa 1820

Rare gold enamel miniature watch by Lénois
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A rare Swiss gold enamel miniature fob watch in the shape of a mandolin, circa 1820.
Gold enamel case; the back cover – with flower decoration and translucent blue and green champlevè enamelling; the front side –  engine turned and translucent blue and green enamelled with the sound holes for visible dial and balance on a florally chased ground. Enamel dial with Arabic numerals and blued Breguet hands. Signed gilt miniature full plate movement, keywind, with three arm steel balance and blued balance bridge.
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Dimensions: 70 x 30 x 20 mm
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Weight: 27 g
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Signed: Lénois à Genève