Swiss gold watch with box for the American market Circa 1875

Gold full hunting pocket watch
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A key winding watch for the North American market with original box, circa 1875.
An 18k gold case, engine-turned, reeded band, engine-turned, numbered and signed gold dome, enamel, radial Roman hours, auxiliary seconds, signed, blued Breguet hands, half-plate movement, patented movement construction, keywind, nickel-plated, decorated, signed, screwed gold chatons, “Patented Sept. 1859”, five jewels, gold screw compensation balance, counterpoised lever.
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Diameter: 55 mm
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Weight: 136 g
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Signed:  Charles Edouard Jacot  La Chaux de Fonds
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Charles Edouard Jacot des Combes (1817-1897) 
He had a reputation as a specialist in the field of escapements; the renowned innovator worked in Switzerland after having worked and researched in his uncle’s factory in the United States for 20 years. His most influential and most commonly used patent was the “Jacot duplex escapement” (also known as the Chinese duplex escapement).