Swiss gold and enamel mandolin-shaped form watch Circa 1800

Gold and enamel verge form watch
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A very fine and rare Swiss, 18K gold and enamel form watch with a concealed dial, designed as a mandolin, circa 1800. The soundboard with royal blue champlevé enamel, gold wreath and pale blue champlevé enamel sound-hole, the neck in alternating black and white enamel straps, the vaulted back with alternating sections of translucent blue enamel over flinqué and yellow, blue and black diaper pattern, gold twist-wire strings with pearl-set pegs, gold suspension chain. White enamel dial, Arabic numerals. Blued steel Breguet hands. A hinged, gilt brass full-plate movement with cylindrical pillars, fusee and chain, verge escapement with micrometric potence adjustment, plain three-arm brass balance, continental cock with polished steel endplate, silver regulator plate.
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Dimensions: 57 x 27 mm
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Signed: No Name
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Restored soft enamel.