Swiss gold minute repeating lever chronograph Circa 1910

Gold hunting cased repeating chronograph by National Watch Co
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A fine Swiss 18 carat gold hunting cased minute repeating chronograph keyless lever pocket watch, circa 1910. Frosted gilt movement, 15 jewels, straight-line lever escapement, cut bimetallic compensation balance, Breguet balance spring, index regulator, visible chronograph work, repeating on gongs activated by a push button in the band, centrifugal governor. Gold hinged cuvette engraved with technical details. White enamel dial with Arabic numerals, outer minute track and 1/5th of a second chronograph divisions, subsidiary seconds dial and original gold Louis XV hands. Polished case, button at 12 for the start/stop and return-to-zero functions of the chronograph. Dial and cuvette signed.
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Diameter: 55 mm
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Signed: National Watch Co Chaux de Fonds