Swiss gold and enamel Art Deco pocket watch Circa 1920

Gold open faced lever by Longines
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A fine Swiss, open faced 18K yellow gold and enamel Art Deco pocket watch, circa 1920. A polished case, front and back bezel with blue and black enamel decoration, and the case band with an engraved foliate pattern. Silver dial with painted black Arabic Art Deco numerals. Blued steel arrow hands. Movement, 16 jewels, straight-line lever escapement, cut bimetallic compensation balance, blued steel flat balance spring, index regulator. Dial, case and movement signed.
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Diameter: 43 mm
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Signed: Longines  Swiss
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The dial is patinated and slightly spotted.