Swiss gold and enamel mandolin-form watch Circa 1800

Gold and enamel mandolin-form watch by Chevalier & Cochet
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A Swiss of museum quality form watch, The Geneva Mandolin, with Camaieu magnifying glass painting and matching original brooch, circa 1800.
Signed and numbered gilt verge movement. Gold/enamel case, enamelling of the greatest rarity, front with a rococo painting in red Camaieu painting, view to the balance; back with three segments in the same colour, in between green engine-turned enamel, underneath the concealed dial. Brooch made in the same manner. Enamel dial with Breguet-style radial hours, outer minutes track, and filigree Breguet hands. (tip of the hour hand missing)
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Dimensions: 27 x 60 mm
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Weight: 32 g
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Signed: Chevalier & Cochet Genève
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With the matching brooch, this mandolin has been one of the rarest mandolin form watches offered at auction. Chevalier & Cochet was one of the best Geneva manufacturers of enamel watches and automata.
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The camaieu is a monochrome technique in which a painting is set up in one colour of different brightnesses, ranging from very light to very dark.