Swiss 18k gold lever split seconds chronograph Circa 1900

Open faced split seconds chronograph watch by Baume
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A Swiss 18 carat gold open faced keyless lever split seconds chronograph pocket watch, circa 1900. 3/4 Plate gilt finished lever movement, bimetallic compensation balance. White enamel dial with Roman numerals, outer calibrated 1/5th seconds ring, two subsidiary dials for 60 minute register and constant seconds. Polished case, split chronograph operated through the crown and a button in the band, hinged back. Movement signed and numbered, case and cuvette numbered.
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Diameter: 54 mm
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Signed: Baume