Rare Swiss gold watch with up and down indication Circa 1911

Rare gold watch with guillaume balance and updown indication
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A rare Swiss gold open faced keyless chronometer watch with guillaume balance and updown indication, retailed by Wright co. Detroit, circa 1911, damascened nickel lever movement, quality Extramovement, 21 jewels, Guillaume balance, wolf’s tooth winding geared to an extra wheel operating the power reserve indicator, swan-neck micrometer regulator, gold cuvette with inscriptions Presented to S.C. Leonard Sept. 28 1918 by Detroit Rolling Mill Employee.
White enamel dial, Breguet numerals, outer minute track and red Arabic five minute numerals, subsidiary seconds, power reserve sector indication, gold plain case with a monogram on the back, case, dial and movement signed. Extract from the archives confirming date of manufacture 1911 and date of sale in 1913.
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Diameter: 50 mm
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Signed: Patek Philippe
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In 1899, Dr. Charles Edouard Guillaume noticed that steel with an addition of 44.4% nickel had a negative square coefficient of thermal expansion. It resulted in the development of a new type of balance mostly used for time contest or observatory watches so called the Guillaume Balance.

The present example was therefore most probably destined for time contest with its Extra quality movement and Guillaume balance before being delivered to the US market.