Swiss gold open faced keyless lever pocket watch Circa 1977

Gold keyless lever by Patek Philippe
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A very fine, rare and thin Swiss 18 carat gold open faced keyless lever pocket watch, circa 1977. Rhodium-plated movement, stamped twice with the Seal of Geneva Quality Mark, Geneva striping decoration, 18 jewels, straight-line lever escapement, monometallic balance adjusted to heat, cold, isochronism and five positions, self-compensating Breguet balance spring, swan-neck micrometre regulator. White enamel dial with painted Roman numerals, outer minute divisions, subsidiary seconds dial and original black oxidized gold baton hands. Solid case, polished, the back with enamel hunting scene: departure of the pack at daybreak. Dial, case and movement signed, case and movement numbered.
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Diameter: 47 mm
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Thickness: 8 mm
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Signed: Patek Philippe Genève Swiss
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Accompanied by the original Patek Philippe box and Certificate of Origin.