Swiss half-hunting cased minute repeating pocket watch Circa 1910

Gold, enamel, and diamond-set watch by West End Watch Co.
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A Swiss gold, enamel, and diamond-set half-hunting cased minute repeating clock watch, circa 1910. Made for the Indian market. The watch features a jewelled lever movement, steel hammers repeating on coiled gongs, and a gold cuvette. It has a gilt dial with blue Roman numerals, and subsidiary seconds, and is signed West End Co., Extra. The case is made of 18k gold with translucent blue enamel and engraved decoration highlighted with diamonds. Additionally, it has a band of rose-cut diamonds, gilt Arabic numerals, a glazed aperture, and a polychrome enamel panel depicting Leda and the Swan surrounded by graduated rose-cut diamonds. The watch is stamped with a W within a star and numbered G4129 64.
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Diameter: 50 mm
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Signed: West End Watch Co.
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The dial has some marks towards the centre, with numerals that have faded on the subsidiary seconds. The case has chips and scratches on the blue enamel, as well as some scratches on the polychrome enamel panel. The movement is not repeating correctly. 
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The West End Watch Company was established in 1886 by Arnold Amstutz and Constant Droz, who were the owners of the firm Alcide Droz & Sons at the time. The company was located in Saint-Imier (Canton of Bern).
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Inspired by the London district of the West End, Arnold Charpié, who was working as a representative for Alcide Droz & Sons in Bombay, named the company.
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In 1886, Amstutz and Droz started selling watches under the brand name West End Watch Company in the Indian market and also developed the first waterproof pocket watch ever produced: L’Impermeable. One of these pocket watches is now exhibited at the Musée International d’Horlogerie in La Chaux-de-Fonds.
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During the First World War, the West End Watch Company provided West End watches to British and Indian soldiers who were sent from Bombay to the Persian Gulf and on to Mesopotamia (modern-day Iraq).
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In 1917, the West End Watch Company changed its name to Société des Montres West End SA and relocated its headquarters to Geneva. In the same year, the company registered the Sowar brand name. In 1934, Société des Montres West End SA became the first company to use Incabloc shock protection.