Very fine Swiss nickel plated lever precision watch Circa 1911

Nickel plated chronometer watch by Golay Fils & Stahl
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Very fine, accurate Swiss nickel plated keyless lever precision chronometer watch, circa 1911. Gilt brass movement, 21 blue sapphire jewels, straight line lever escapement, Guillaume compensation balance with gold temperature and meantime adjustment screws, blued steel Breguet balance spring with terminal curve, index regulator, wolf’s tooth winding. Dial signed, case numbered, movement signed and numbered. Comes with original 1 ST class ‘bulletin de marche’ from the Observatoire de Genève on 7 June 1911 and the original National Physical laboratory in Richmond class Kew A certificate from 1 July 1911.
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Diameter: 58 mm
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Signed: Golay Fils & Stahl Genève
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This Chronometer was submitted successively at the Geneva observatory where it obtained a bulletin de marche for first class category from June 1911 and then immediately submitted to the National Physical laboratory in Richemond where it obtained its Kew A certificate. Amazingly, all the documentation pertaining to these trials have been kept.