Thin elegant Swiss 18K gold keyless dress watch Circa 1940

Gold open faced lever pocket watch by Patek Philippe & Co.
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An elegant extra thin Swiss gold keyless dress watch, circa 1940.
Rhodium-plated movement, Geneva striping decoration, 18 jewels, straight-line lever escapement, cut bimetallic compensation balance with blued steel Breguet balance spring, index regulator. Silvered dial with painted black baton hour indexes and applied gold quarter hour baton indexes, outer minute track with gold five-minute dots, subsidiary seconds dial, and gold baton hands. Brushed and polished 18K gold super thin case, stepped bezel. Dial, case and movement signed.
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Diameter: 47 mm
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Weight: 47 g
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Signed: Patek Philippe & Cie Genève