Swiss gold watch with pivot detent escapement Circa 1850

Gold pocket chronometer
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A Swiss 14 carat gold open faced key wind chronometer pocket watch made by Robert Brandt & Compagnie in La Chaux-de-Fonds, circa 1850. The engine turned case has plain bezels, pendant and bow. The white enamel dial features Roman hour numerals, outer minute divisions, subsidiary seconds at 6 o’clock and moon hands. The bridge movement is fitted with a pivoted detent escapement, gold screw compensation balance and gilt Breguet balance spring.
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Diameter: 47 mm
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Weight: 72 g
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Signed: Robert Brandt & Cie Chaux-de-Fonds