Swiss 18k yellow gold keyless dress watch Circa 1976

Gold open faced lever pocket watch
–
A very fine, thin Swiss, 18K yellow gold keyless dress watch, circa 1976. Sold on November 16, 1977. Accompanied by the original Patek Philippe box and the Extract from the Archives. A solid, polished and brushed case. White enamel dial with painted radial Roman numerals, outer minute divisions, subsidiary seconds. Black baton hands.  A rhodium-plated movement, Geneva striping decoration, stamped twice with the Seal of Geneva Quality Mark, 18 jewels, straight-line lever escapement, monometallic balance adjusted to heat, cold, isochronism and five positions, self-compensating Breguet balance spring, swanneck micrometre regulator. Dial, case and movement signed. From the Collection of a Spanish Gentleman.
–
Diameter: 47 mm
–
Signed: Patek Philippe  Genève