Early French silver key wind verge pocket watch Circa 1780

Silver open faced pocket watch
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A French silver open faced key wind pocket watch made by Jean-Antoine Lépine in Paris, circa 1780. A pierced case. White enamel dial with Arabic hour numerals, an outer minute track with five minute markers and silver arrow hands. The movement with a verge escapement. Signature on the case and movement.
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Diameter: 45 mm
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Weight: 77 g
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Signed: Lépine à Paris
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The case is slightly oxidized.