Swiss gold split seconds full hunter chronograph Circa 1900

Gold lever split seconds chronograph
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A Swiss 18 carat gold hunting cased keyless pocket watch with split seconds chronograph and an unusual regulator, circa 1900. The gilt movement is jewelled through the chronograph train, has a straight line lever escapement, bimetallic balance with blued overcoiled spring and polished steel regulator with micrometre screw opposing a large C spring, the chronograph train mounted on bridges with a split mechanism under the dial. White enamel dial with Roman hours, an outer minute track, outermost fifth of a second divisions and Arabic five minute numerals, subsidiary continuous seconds at 6 o’clock, a 30 minute register at 12 and blued steel hands. The plain case has a button in the band for the start/stop and flyback function of the chronograph and a second button for the split function, safety lock pins engage the closed cover,
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Diameter: 52 mm
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Signed: Jules Keiser à Zug