Swiss very rare pocket watch with center seconds Circa 1906

Open faced gold pocket watch by Patek Philippe
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A Swiss very rare Patek Philippe pocket watch with center seconds and extract of the archive, circa 1906.
18 carat gold case with monogram HC on back; precision lever movement with special fine adjusting device, wolf’s toothing and moustache lever; original enamel dial with red and black Arabic numerals, very rare center seconds and pink gold Louis XV hands.
Dial and movement signed. Case and movement numbered.
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Diameter: 45 mm
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Weight: 76 g
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Signed:  Patek Philippe & Cie Genève