Elegant Swiss 18 carat gold double dialled pocket watch Circa 1915

Gold double-dialled lever pocket watch
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A very fine and extremely rare, elegant Swiss, 18 Carat gold double dialled, pocket watch, circa 1915. A keyless watch with independently adjustable hands for each dial for use in two time zones. A polished case, glazed gold rimmed cover over the second dial. First dial: white enamel, Breguet numerals, outer minute track, subsidiary seconds. Yellow gold Breguet hands. Second dial: Matte silver, radial Roman numerals, outer minute track, engine turned centre, small aperture to access the regulator. Yellow gold spade hands.
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A rhodium plated movement, Geneva striping decoration, 19 jewels, wolf’s tooth winding, straight line lever escapement, cut bimetallic compensation balance with peripheral gold temperature and meantime adjustment screws, blued steel Breguet balance spring, screw micrometre regulator, three five spoke wheels on the movement to drive the second pair of hands. Dial, case and movement signed.
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Diameter: 49.5 mm
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Signed: Vacheron & Constantin  Geneva
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Double-face watches by Vacheron & Constantin are extremely rare, watches allowing for the simultaneous keeping of time in more than one time zone and world time watches were rare before the 1950’s and mass international travel. Of course, prestigious watchmaking houses such as Patek Philippe and Vacheron & Constantin made these watches for their best clientele who were by their nature, frequent travellers.