Gold, enamel and diamond set lever with brooch Circa 1912

Keyless lever pendant watch with corresponding brooch by Patek Philippe
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A rare Swiss 18 carat gold, enamel and diamond set keyless lever pendant watch with corresponding enamel and diamond brooch, circa 1912. Jewelled lever movement. Silvered dial with Breguet numerals. The bezel with translucent grey blue enamel over engine turning, snap on case back with a ground of translucent grey blue enamel centred by a panel of royal blue enamel over engine turned ground highlighted by filigree work set with round cut diamonds, the bow with white opaque enamel band. Case and movement signed and numbered, dial signed.
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Diameter: 27 mm
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Signed: Patek, Philippe & Co Geneva-Switzerland