French/Swiss gold important 8 day pocket watch Circa 1790

Gold cylinder watch with date by André Hessen
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An important French/Swiss pocket watch with 8 day movement and date indicator, circa 1790/1890.
Probably unique contract work by the firm of Patek Philippe.
This is now an extremely elegant typical Directoire style watch fitted with a bespoke Patek Philippe precision movement dating to the late 19th century. Further research might certainly provide fascinating insight into the history of this remarkable piece.
This watch consist a 18 carat rose gold, polished, fine engraved case, with a noble family crest on reverse side depicting the coat of arms of the Dutch Oosting family. The dial is enamel and it has a bridge movement, a large hanging barrel, a cylinder escapement and a monometallic screw balance.
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Diameter: 59 mm
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Weight: 113 g
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Signed: André Hessen, Paris
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André Hessen

André Hessen worked as clockmaker to the king’s brother in Paris from 1775 to 1790; he later went to Stockholm. Today many of his creations are kept in Paris and Stockholm. Hessen also published the paper “Mém. sur l’Horlogerie”.