Swiss gold split seconds open faced chronograph watch Circa 1904

Gold chronograph watch by Patek Philippe & Co.
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A Swiss, yellow gold, split seconds, open faced chronograph watch, circa 1904. Retailed by Black, Starr & Gorham & Spaulding & Co. The 17″‘ ligne movement, signed Patek Philippe & Cie Genève, features 25 jewels and a lever escapement. The satin silver sector dial is marked with Black, Starr & Gorham / Patek Philippe & Cie Genève. It includes raised gold Arabic numerals, outer minute divisions, a subsidiary seconds dial, blued split seconds hands, and yellow gold feuille hands. The case is made of 18k yellow gold in a bassine style, with a cuvette, signed Spaulding & Co. Paris / Fabrique à Genève, and a monogrammed hinged back.
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A Patek Philippe Extract from the Archives confirms the date of sale as December 6, 1904.
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Diameter: 45 mm
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Signed: Patek Philippe & Cie. Genève
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The case is generally in good condition, with the monogram on the back and the engravings still relatively well defined. Some visible wear can be seen with the naked eye. The dial is in fair condition, with noticeable stains primarily at the 6 and 12 o’clock positions and surface scratches and spots. The Extract from the Archives indicates that the dial is not documented in their records. The split second chronograph function is operating, and the movement is running smoothly.