Swiss gold lever with center seconds chronograph Circa 1885

Gold open faced center seconds chronograph
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Very fine Swiss 18 carat gold open faced keyless chronometer pocket watch with center seconds chronograph, circa 1885. Rhodium plated decorated movement, 21 jewels, lever escapement, cut bimetallic compensation balance with meantime and temperature adjustment screws, blued steel Breguet balance spring, index regulator. Case signed and numbered. Comes with ‘Bulletin de march’ from 23 October 1885.
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Diameter: 52 mm
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Signed: Bautte