Swiss 18K gold keyless open faced dress watch Circa 1979

Gold lever pocket watch by Patek Philippe
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A very fine, thin and elegant, keyless, 18K gold Swiss dress watch, circa 1979. Accompanied by the extract from the archives.
Solid, polished 18K yellow gold hinged case back. Matte silver dial with applied yellow gold Breguet numerals, subsidiary seconds dial, and yellow gold Breguet hands. Stamped with the Seal of Geneva Quality Mark, rhodium-plated movement, Geneva striping decoration, 18 jewels, straight-line lever escapement, swan-neck micrometre regulator. Dial, case and movement signed.
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Diameter: 44 mm
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Signed: Patek Philippe Genève