Swiss silver double sided pocket watch with 24h dial Circa 1780

Silver watch with second time zone and date
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An extremely rare double sided pocket watch with 24 hour dial, second time zone and date made by Duchêne & Compagnie in Genève, Switzerland, circa 1780. The case of this watch is crafted from silver and is glazed on both sides. The face has a white enamel dial with Roman hours, Arabic 15 minutes, Arabic days of the month numerals and steel hands. The second time zone dial on the reverse has Arabic quarter- and 24 hour numerals and also steel hands. The movement has a verge escapement.
The dial is signed.
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Diameter: 40 mm
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Weight: 56 g
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Signed: Duchêne & Compagnie
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This watch has an extremely rare complication for a watch from this period.
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Duchène
The company Duchêne was founded by Louis Duchêne (1730-1804) in Geneva around 1750. From 1770 until 1790 they signed their products with Duchêne & Cie. In 1791 the company name changed to Louis Duchêne & Fils and traded under that name until 1820. The two sons of Louis Duchêne, Jacob Louis Duchêne (1751-1800) and Jacob Etienne Duchêne (1759-1840) were partners in the firm. Watches by Duchêne carry various signatures on the dials, cases and movements.