Swiss deck chronometer with Guillaume balance Circa 1919

Silver open faced lever pocket watch by Patek Philippe
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A very fine and rare Swiss, keyless, silver deck chronometer, Montre de Torpilleur, quality EXTRA, circa 1919.
Rhodium-plated movement, top quality Ankerchronometer, quality extra, movement number punched twice, as prescribed for deck chronometers, 2x Geneva seals, Guillaume balance, diamond endstone, wolf’s toothing, fine adjusting device. Signed and numbered silvered dial with Arabic radial hours, outer minutes track, subsidiary dial for the seconds, and blued steel hands. Solid, polished case, hinged silver cuvette. Accompanied by the extract from the archives and test certificate (extract from the archives), tested at the Observatory in Geneva 1931. And sold in 1942.
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Diameter: 60 mm
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Weight: 159 g
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Signed: Patek, Philippe & Cie. Genève
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Patek Philippe made these deck chronometers for sale and mainly to participate in chronometer competitions. The extract from the archives states that this top chronometer was created in 1919 but sold in 1942. In 1931, the chronometer successfully participated in the 1st class deck chronometers competition in Geneva. These chronometers are extremely rare. Only a few have turned up at auctions in recent years, some achieving results of more than 25,000 Swiss Francs. This chronometer was probably sold to the German navy in 1942, as the German import punch indicates!