Swiss platinum diamond set lever pendant watch Circa 1912

Platinum, diamond set open faced keyless lever by Patek Philippe
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A fine Swiss platinum and diamond set open faced keyless lever pendant watch, circa 1912. Nickel finished lever movement, bimetallic compensation balance. Later silvered guilloché dial with Breguet numerals. Case with basket weave design to the back interspersed with diamonds, diamond set bezel, bow and rim. Comes with an associated 14 carat white gold and diamond set pendant chain. Case, dial and movement signed, case and movement numbered.
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Diameter: 26 mm
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Signed: Patek Philippe Geneva