Rare French gold and pearl set shell shaped verge Circa 1800

Pendant watch in the form of a shell
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A French 18 carat gold and pearl set shell shaped pendant watch, circa 1800. The gilt movement with a verge escapement. Rare version of a hunting cased watch, intricately engraved and decorated on both sides with fine small half pearls. White enamel dial with Arabic numerals and rose gold hands, the tip of the minute hand is missing.
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Dimensions: 42 x 32 mm
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Weight: 21 g
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Signed: No name