Important American hunting cased precision lever Circa 1870

Fasoldt’s patented coaxial double wheel lever chronometer precision watch
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An important, heavy American 18 carat gold hunting cased pocket watch with Fasoldt’s patented coaxial double wheel lever chronometer precision escapement, circa 1870. Engine turned à goutte case, tiered, reeded band, case maker’s punch mark EH for E. Humboldt. Engine turned gold cuvette. White enamel dial with Roman hours, sunken subsidiary seconds and blued Breguet hands. Rhodium-plated bridge movement, blued screws, signed Pat. Feb. 1.1859/Apr. 5. 1864 & March 7. 1865, train with six armed wheels, Fasoldt’s patented double wheel lever chronometer escapement, escape wheel with large locking and small impulse wheel, gold screwed compensation balance, Fasoldt’s patented special form fine adjusting device. Dial signed.
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Diameter: 55 mm
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Weight: 179 g
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Signed: Chas Fasoldt Albany New York