Swiss 18 carat gold split seconds chronograph with register Circa 1920

An extremely fine watch with a complicated lever escapement
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An extremely fine split seconds chronograph with register, made by Vacheron & Constantin in Genève, Switzerland, circa 1920. The numbered case of this watch was crafted from 18 carat gold and features a monogram “WM” on the back lid. The white enamel dial has an outer ring with Arabic 5 minute numerals, Arabic hour numerals, a subsidiary seconds dial at 6 o’clock, a 30 minute counter at 12 o’clock and blued Breguet hands. The numbered movement is fitted with a highly complicated precision lever escapement with fine adjusting device and split seconds chronograph.
The cuvette is signed.
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Diameter: 51 mm
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Weight: 95 g
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Signed: Vacheron & Constantin, Genève