Swiss gold patented open faced anker chronometer Circa 1915

Gold lever pocket watch
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A very fine pocket watch in its original presentation box made by Vacheron & Constantin in Genève, Switzerland, circa 1915. The numbered open faced case of this watch, which was crafted from 18 carat gold, has a cuvette which is marked Vacheron & Constantin Genève Chronomètre. The white enamel dial has Arabic hour numerals, an outer minute track, a subsidiary seconds dial at 6 o’clock and blued steel hands. The numbered movement has an extremely rare quality, patented anker chronometer escapement, 21 jewels, a special fine adjusting device, wolf’s toothing and is adjusted in eight positions.
The cuvette, dial, movement and presentation box are signed.
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Diameter: 51 mm
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Weight: 93 g
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Signed: Vacheron & Constantin Genève
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Genuine chronometer movements by Vacheron & Constantin are rarely found in pocket watches. Mostly, these movements were given to contests at Observatories.