Swiss pocket watch with Guillaume Integral balance Circa 1920

Gold gentleman’s Geneva watch by Vacheron & Constantin
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A Swiss open faced gentleman’s Geneva pocket watch with Guillaume Integral balance – for the American market, circa 1920.
18-Carat gold, polished case with engraved monogram and gold dome. Signed enamel dial with Arabic numerals, auxiliary seconds, and gold cathedral hands. Bridge movement, German silver, ground, eight adj, twenty-one jewels, pink gold train, screwed gold chatons, wolf-teeth winding wheels, Guillaume Integral balance, and a patented fine adjusting device PAT MAY 24 1904.
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Diameter: 45 mm
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Weight: 72 g
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Signed: J. E. Caldwell & Co.
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JE Caldwell & Co, American watch manufacture
JE Caldwell & Co. was active in Philadelphia around 1910. The company pulled works from the Manufacture Drocourt and Henri Robert Ekegrèn.