Fine and rare Swiss gold complicated watch Circa 1925-1950

Open faced complicated lever by Audemars Piguet
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A very fine and rare Swiss 18 carat gold open faced minute repeating perpetual calendar split seconds chronograph keyless lever watch, circa 1925-1950. Nickel finished lever movement, 34 jewels. Silvered matte dial, applied baton numerals, four subsidiary dials for constant seconds combined with date, 30 minute register combined with day, month combined with leap year indicator and phases of the moon with lunar calendar. Polished case with stepped bezels. Case, dial and movement signed.
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Diameter: 50 mm
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Signed: Audemars Piguet Swiss