Swiss 18 Carat yellow gold open faced lever pocket watch Circa 1910

Gold keyless pocket watch
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A Swiss 18 Carat yellow gold keyless pocket watch, circa 1910. One piece case with screwed reeded bezel, case back engine turned in a sun burst pattern with an off center oval plaque, inner double anti magnetic steel back, Swiss patent No. 46209. White enamel dial with painted Arabic numerals, outer minute track, sunk subsidiary seconds dial and blued steel Breguet hands. A gilt brass movement, 15 jewels, straight line lever escapement, cut bi metallic balance, Breguet balance spring with micrometer regulator.
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Diameter: 49 mm
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Signed: Zenith  Swiss
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The case is slightly worn.
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Zenith SA is a Swiss luxury watchmaker. The company was founded in 1865 by Georges Favre-Jacot in Le Locle in the canton of Neuchâtel and is one of the oldest continuously operating watchmakers. Favre-Jacot invented the concept of ‘in-house’ movements, believing that only through control of the entire watchmaking process, perfection could be achieved. Zenith was purchased by LVMH (Moët Hennessy Louis Vuitton) in November 1999, becoming one of several brands in its watch and jewellery division which includes TAG Heuer and Hublot.