Swiss gold minute repeating chronograph Circa 1880-1899

Rose gold hunting cased repeating lever chronograph by Alto Watch Co. 
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A fine Swiss 18 carat rose gold hunting cased minute repeating keyless lever chronograph pocket watch, circa 1880-1899. Nickel finished lever movement, 30 jewels, bimetallic compensation balance, minute repeating on two polished steel hammers on to two gongs, activated through a slide in the band. Gold cuvette. White enamel dial with Roman numerals, outer calibrated fifth seconds ring, two subsidiary dials for constant seconds and 30 minute register and blued Breguet hands. Engine turned case, monogrammed cartouche to the front, chronograph operated through a button in the band, hinged back. Case, cuvette and movement signed, case and cuvette numbered.
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Diameter: 57 mm
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Signed: Alto Watch