Swiss 18K yellow gold chronograph pocket watch Circa 1913

Gold open faced chronograph lever watch
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A Swiss 18 carat yellow gold open faced chronograph pocket watch made by Patek Philippe & Cie in Geneva, sold in Geneva on September 6, 1913. It has a hand wound mechanical movement with a compensated bimetallic balance, a lever escapement, and micrometric adjustment. The white enamel dial features Arabic numerals for hours and minutes, a central chronograph hand, a minute track with 1/5 second graduations, a subsidiary seconds dial, and Louis XV style hands.
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The caseback bears a white enamel GR monogram. The gold cuvette is engraved with the dedication souvenir de profonde reconnaissance 1912. A single push button on the pendant activates the chronograph. The round 18 carat yellow gold case is smooth with a hinged back. It comes with a monogrammed GR case, certificate of origin, spare spring, additional glass, and a signed leather carrying case. Case, dial, and movement are signed Patek Philippe & Cie, Genève.
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Diameter: 48 mm
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Weight: 87.3 g
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Signed: Patek Philippe & Cie, Genève
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According to family tradition, this watch once belonged to surgeon Gabriel Roux from Marseille. It was a gift from a patient and has been carefully kept in its original box marked with the initials G R. The set includes all original accessories: the Patek Philippe certificate of origin, a spare spring, a spare crystal, and a leather travel case. Its condition is excellent. Dr Gabriel Roux, a professor at the École de Médecine and surgeon at Marseille hospitals by age 29, was highly regarded for his surgical skills. He also stood out during the Great War of 1914-1918.