Swiss gold enamel watch with decentralized dial Circa 1787-1810

Gold enamel silver watch by Frères Wiss et Menu
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A highly interesting gold/enamel Swiss open faced pocket watch with a decentralized dial, circa 1787-1810.
Full plate movement, gilt, chain/fusee, solid movement pillars, verge escapement, three-arm brass balance, blued balance spring, fine florally engraved and pierced balance bridge. Decentralized silver engine-turned dial with Roman radial hours, outer minutes track, and Breguet-style hands. Very lavishly gold enamel case with segments enamelled in different colours. Rim and pendant engraved. Movement signed.
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Diameter: 40 mm
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Signed: Fs Wiss & Menu
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Les Frères Wiss, Swiss watch manufacturer and watch dealer
The Les Fréres Wiss company was founded in 1760 by Pierre-Isaac Wiss and Jacob Wiss. In 1775 the company was renamed Frères Wiss & Amalric with business partner Abraham Amalric. After the death of Jacob Wiss in 1784, the company was renamed Wiss & Amalric until 1786. In 1787 Jean Nicolas Menu became a business partner in the company. Jean Nicolas was a watchmaker, watch dealer and married to the daughter of Jacob Wiss. From then on, the company continued as Wiss Frères & Menu.