Swiss 18K yellow and white gold Art Nouveau pocket watch Circa 1920

Gold pocket watch with a silver dial
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A rare Swiss 18K yellow and white gold Art Nouveau pocket watch, circa 1920.
A polished case, bezel engraved with a foliate pattern. Case back with a similar pattern around engraved striping. Silver dial with painted Arabic numerals, sub seconds at 6 and blued steel cathedral hands. A rhodium-plated movement, 16 jewels, Geneva striping decoration, straight-line lever escapement, cut bimetallic compensation balance, blued steel Breguet balance spring, index regulator. Dial, case and movement signed.
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Diameter: 47 mm
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Signed: Longines  Swiss
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The dial is slightly spotted.