Swiss gold/enamel watch with quality movement Circa 1830

Open faced pocket watch probably from Geneva
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A Swiss extremely unusual, big gold and enamel pocket watch with special movement quality, circa 1830.
18 carat gold, very fancy and specially designed case with 2-fold cord rim, in between white enameled, enamel painting with river landscape on back and dark blue enameled background. Very fine movement with extravagant lever escapement with an early version of a moustache lever. White enamel dial with Roman numerals and golden Fleur-De-Lys hands.
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Diameter: 58 mm
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Weight: 88 g
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Signed: No name