Swiss gold and enamel Art Deco pocket watch Circa 1920

Gold pocket watch with inlaid enamel case by Longines
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An extremely rare, Swiss gold manual wind round-shaped open faced Art Deco pocket watch with a green enamel dial and inlaid enamel case, circa 1920. Made for L.G. Riganti & Co Bangkok.
Movement, calibre 18.95M, straight-line lever escapement, cut bimetallic compensation balance, blued steel flat balance spring, index regulator. Green enamel engine turned dial with applied gold Breguet-style radial hours, outer minutes track, subsidiary dial for the seconds, and original gold Cathedral hands. Round-shaped 18K yellow gold case, case back black inlaid enamel with gold floral pattern. Case, dial, and movement signed.
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Diameter: 44 mm
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Weight: 48 g
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Signed: Longines, L.G. Riganti & Co Bangkok