Swiss platinum and 18k yellow gold dress watch Circa 1925

Platinum keyless Art Deco dress watch
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A very fine and rare Swiss, thin, platinum and 18K yellow gold, keyless Art Deco dress watch, circa 1925. Brushed yellow gold with a platinum band, bow, bezel, and border with platinum fillets. Brushed silver dial, black champleve numerals, outer minute track. Blued steel Breguet hands. A rhodium-plated movement, Geneva striping decoration, 18 jewels, straight-line lever escapement, cut-bimetallic compensation balance with blued steel Breguet balance spring, index regulator. Dial signed, case numbered.
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Diameter: 47 mm
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Signed: A l’Emeraude  Lausanne