Patek Philippe & Co., Genève, 763.017, ref.2526, 1956; a fine gold automatic wristwatch with enamel dial, luminescent numerals and gold bracelet

18k, nickel lever automatic movement, stamped with the seal of Geneva, 30 jewels, gyromax balance, adjusted to heat, cold, isochronism and 5 positions, precision regulator, 18k gold engine turned rotor, white enamel dial, applied gold luminescent baton numerals and hands, subsidiary seconds, circular case with screw-down back, case, dial and movement signed, with an 18k gold heavy tree row curb link bracelet, signed Gay Frères/Patek Philippe, accompanied by a black leather presentation box and an Extract from the Patek Philippe Archives 

The Extract from the Patek Philippe Archives confirms that this watch was manufactured in 1956, left the factory with luminescent gold numerals and was sold on December 5th the same year.