Unusual Swiss gold Art Deco oversized dress watch Circa 1930

Gold dress watch with a black 24-hour dial
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A very fine Swiss, unusual, large, thin, keyless, 18K yellow gold Art Deco oversized dress watch with a black 24-hour dial, circa 1930. A solid, polished case. Black dial with applied yellow gold baton numerals, concentric 24-hours in gilt Arabic numerals. Yellow gold épée hands. Movement, 18 jewels, straight-line lever escapement, cut bimetallic compensation balance adjusted to temperatures and two positions, blued steel flat balance spring, swan-neck micrometre regulator. Dial and movement signed, case numbered.
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Diameter: 56 mm
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Signed: E. Gübelin  Lucerne–