Swiss gold skeletonized minute repeating lever Circa 1830

Skeletonized repeating keywound watch with pin pallet lever escapement 
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A fine, rare and unusual Swiss 18 carat rose gold skeletonized minute repeating keywound watch with pin pallet lever escapement, circa 1830. Finely engraved gilt finished jewelled pin pallet lever movement, minute repeating on two hammers onto two undulating gongs with snake head terminals, regulation lever underneath the skeletonized dial with Breguet numerals on outer white enamel chapter ring and serpentine hands. Engine turned case, pendant locking lever in the ribbed band, minute repeating through the pendant. Movement ring and dial signed, case numbered and stamped with casemaker’s initials CHI.
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Diameter: 57 mm
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Signed: Vaucher Frères