Swiss flat 18K gold pocket watch with vest chain Circa 1925

Yellow gold open faced lever watch
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A flat Swiss 18 carat yellow gold pocket watch with an 18 carat yellow gold vest chain, made by Zenith, circa 1920–1930. The watch features a hand wound mechanical movement, signed and numbered, with a lever escapement, compensated bimetallic balance, and blued steel Breguet balance spring. Its two tone gilt dial displays painted Arabic numerals, an outer railway minute track, a subsidiary seconds dial at 6 o’clock, and cathedral style hands. The case has a smooth back and is numbered. Both the dial and movement are signed by Zenith.
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Diameter: 46 mm
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Total weight (watch and chain): 66 g.
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Signed: Zenith