Swiss 18 carat gold split seconds chronograph Circa 1920

Fine and rare gold open faced split seconds chronograph
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A Swiss yellow gold open faced minute repeating split seconds chronograph keyless watch with register circa 1920, retailed by Golay Fils & Stahl Geneva, manual winding jewelled nickel lever movement, cut bimetallic balance, swan neck regulator, two hammers repeating on gongs, 18k yellow gold hinged cuvette.
White enamel dial, Roman numerals, minute divisions subsidiary dials for constant second and 30-minute register, outer 1/5 second divisions, 18k yellow gold polished case, repeating slide and chronograph pusher to the band, cuvette, movement and dial signed by the retailer, case and movement numbered and cuvette numbered.
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Diameter: 47 mm
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Signed: Golay Fils & Stahl Geneva Swiss