Rare Swiss gold open faced chronometer watch Circa 1912

Keyless wind chronometer pocket watch
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A rare Swiss pocket chronometer with 30 h power reserve indicator made in quality “Extra”, circa 1912.
The watch was entered 1912-1913 for the Geneva observatory competition
(3rd rank) and in Kew/Teddington 1913-1914.
It’s made for the Sweeney Jewelry Co., Houston, Texas. An 18k gold case, enamel dial, bridge movement “Extra”, Guillaume gold screw balance.
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Diameter: 50 mm
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Weight: 107 g
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Signed: Patek Philippe & Co.  Geneva
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J.J. Sweeney established his jewellery store in Houston in 1875. The business existed until 1998 when it was bought by a larger company. In 1908 Sweeney purchased a large long case clock from clockmaker E.A. Howard in Boston, which he had standing outside his shop for many years in 1929 he donated it to the city of Houston. For decades the citizens of Houston used to set their watches to the Sweeney clock which was always accurate. After an extensive restoration the clock now stands in a small park in the city centre, a lasting memorial to J.J. Sweeney.