Swiss 18 carat gold split seconds lever chronograph Circa 1915

Open faced lever chronograph with Guillaume balance by Paul Ditisheim
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A Swiss 18 carat gold open faced keyless split seconds lever chronograph with Guillaume balance, circa 1915. Retailed by The Goldsmiths & Silversmiths Company Ltd. Case stamped with London import letter for 1915. Nickel finished jewelled lever movement, Guillaume balance. Gold cuvette. Off-white enamel dial, Roman numerals, outer scale graduated for 80 miles per hour, two sunk subsidiary dials for 60 minutes register and constant seconds. Plain case, split seconds chronograph buttons in the band and in the crown, chronograph locking slide in the band. Case signed and numbered, stamped ‘GS’ and with London import letter for 1915, cuvette, dial and movement signed and numbered.
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Diameter: 55 mm
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Signed: Paul Ditisheim La Chaux-de-Fonds Grand Prix Paris 1900