Swiss gold open faced keyless lever pocket watch Circa 1899

Gold lever pocket watch by Patek Philippe
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A pink gold Patek Philippe Ankerchronometer with rare calibre, original box and original papers, circa 1899. An18K pink gold, Patek Philippe case punch, very rare Ankerchronometer calibre, especially chronometer balance, wolf’s toothing, special barrel bridge, plate with patent punch 2680 (Patek Philippe Swiss Patent 2680 dated 27 September 1890), signed enamel dial in very beautiful condition, pink gold hands, intact, case with several dents and missing bow, refurbishment recommended. Despite the case imperfections, this is an interesting collector’s watch because it is a rare chronometer calibre and the watch is in its original box with original papers.
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Diameter: 49 mm
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Weight: 91 g
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Signed:  Patek Philippe & Cie Genève