Swiss 18K white gold Art Deco keyless dress watch Circa 1923

White gold watch with rose-cut crystal band
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A very fine and thin Swiss, 18K white gold Art Deco keyless dress watch with rose-cut crystal band, circa 1923. Matte silvered dial with black Arabic numerals, outer minute track, sunk subsidiary seconds dial and blued steel hands. Rhodium-plated movement, straight-line lever escapement, cut bimetallic compensation balance, blued steel Breguet balance spring, index regulator. Dial and movement signed.
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Diameter: 44 mm
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Thickness: 6 mm
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Signed: R. Beguin  Genève