Probably French fine and very flat pink gold Lepine Circa 1820

Open faced 18k pink gold pocket watch, probably France
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A probably French fine and very flat pink gold Lepine with digital jumping hours and rare caliber with corresponding and probably original key and old box, circa 1820.
18 carat pink gold engine turned case in very flat edition and rare caliber; very flat cylinder movement and escapement below dial; engine turned dial with digital and jumping hours, decentralized minutes, sunk subsidiary dial for the seconds, one steel hand for the minutes and one gold hand for the seconds.
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Diameter: 42 mm
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Weight: 45 g
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Signed: No name
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Technical interesting collector’s watch.