Swiss 18 carat gold full hunter cased watch with repeater Circa 1850

Watch with quarter repeater and champlevé dial
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A gold full hunter cased watch with repeater, made by Patek & Comp in Genève, Switzerland, circa 1850. This numbered full hunter cased watch was crafted from 18 carat gold and is engine turned on both sides and the champlevé decorated dial has Roman hour numerals and steel hands, The very rare movement has a typical construction of the winding wheels, wolf’s toothing, a cylinder escapement and a quarter repeater.
The accompanying box which is signed A. Cairelli Roma Consessionario Patek, Philippe & Cie, is probably from a later date.
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Diameter: 49 mm
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Weight: 86 g
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Signed: Pateck (dial) Patek et Comp (movement)
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The item presented here  is one of the earliest pocket watches made by Antoine Norbert de Patek in collaboration with Jean-Adrien Philippe and has crown winding and complications. The dial and hands are no longer original.
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Patek, Philippe & Co
Patek & Comp was the initial name of Patek, Philippe & Co. In 1839, Antoine Norbert de Patek and François Czapek founded Patek, Czapek & Cie. After Patek and Czapek parted ways, Patek partnered with Adrien Philippe and the company was renamed Patek & Comp, which later became Patek, Philippe & Co in 1851.

Detailed history of the Patek company names:

1839: Antoine Norbert de Patek and François Czapek establish Patek, Czapek & Cie in Geneva.

1844: Patek meets Adrien Philippe, inventor of the keyless winding mechanism.

1845: Patek and Czapek dissolved their partnership due to disagreements.

1845: Patek and Philippe establish Patek & Comp.

1851: The company is renamed Patek, Philippe & Co.