Very thin Swiss gold with enamel cylinder watch Circa 1820

Gold/enamel open faced watch 
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A fine and rare, very thin Swiss 18K yellow gold and enamel pocket watch, circa 1820. Case decorated with blue and white-enameled, flower decoration over engine turning, central medallion, reeded band. White enamel dial with painted radial Roman numerals, outer minute divisions. Yellow gold, Breguet hands. Gilt brass, signed movement, full plate, entirely decorated with scrolls and flowers, 11 jewels, cylinder escapement, brass balance, flat balance spring.
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Diameter: 42 mm
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Signed: Jn. Fs. Bautte Genève