Swiss platinum watch with diamond-set case band and bow Circa 1920

Platinum lever by Jules Jürgensen 
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A very fine and elegant Swiss, platinum keyless pocket with diamond-set case band and bow, circa 1920. The case band and bow are set with diamonds, the crown with an onyx cabochon, snap-on case back with a gold monogram. Brushed silver dial with applied silver Arabic numerals, silver dot outer minute divisions. Gold cathedral hands. A brushed movement, 19 jewels, straight-line lever escapement, cut bimetallic compensation balance, blued steel Breguet balance spring, index regulator, adjusted for positions and temperature. Case, dial and movement signed.
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Diameter: 45 mm
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Signed: Jules Jürgensen  Swiss made
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The dial is spotted.