Swiss gold minute repeating lever chronograph Circa 1910

Gold open faced repeating chronograph by Badollet & Cie 
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A very fine, rare and large Swiss 18 carat gold open faced minute repeating chronograph keyless lever pocket watch with instantaneous 30-minute register, circa 1910. Frosted gilt movement, 32 jewels, calibrated straight-line lever escapement, cut bimetallic compensation balance, blued steel Breguet balance spring with overcoil, swan-neck micrometre regulator, steel chronograph work, repeating with two hammers on two gongs activated by a slide on the band. Gold hinged cuvette. White enamel dial with Arabic numerals, outer minute track and fifths of a second divisions, Arabic five seconds numerals, subsidiary seconds and 30-minute register and original blued steel spade hands. Polished case, wide curved bezel, concealed hinge. Movement signed.
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Diameter: 54 mm
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Signed: J.J. Badollet & Cie Genève
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Badollet & Cie. Horologists and makers of watch cases, the company was registered on November 1, 1880, under the number 43. They received the 1st prize at the Observatory contest for chronometry in 1872 (with 267.9 points out of 350), 1873 (with 229 points out of 350) and in 1874 (with 264 points out of 350), and in 1874-75 (with 213 points out of 350). In 1874, Badollet tied with H.R. Ekegrén for those contestants presenting a minimum of three chronometers.