Swiss 18K yellow gold and enamel keyless dress watch Circa 1925

Gold open faced lever by Patek Philippe & Cie 
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Swiss 18K yellow gold and enamel keyless dress pocket watch, circa 1925. Accompanied by the Extract from the Archives, sold on August 19, 1926. A polished case, outer reverse and bezel with black enamel decoration to a gold pattern, the case back with raised monogram WF.S in white gold. Brushed silver dial, applied yellow gold Art Deco numerals, outer minute dots, subsidiary seconds and gold spade hands.
A rhodium-plated movement, 18 jewels, straight-line lever escapement, cut bimetallic compensation balance adjusted to eight positions, blued steel Breguet balance spring, index regulator. Dial, case and movement signed.
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Diameter: 45 mm
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Signed: Patek Philippe & Cie  Genève
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The case is slightly scratched.