A Gold sweep seconds wristwatch with water-resistant-type case, Patek Philippe & Co. , no. 705592, ref. 2508 1956

18k, nickel lever (27SC) movement, stamped twice with the seal of Geneva, 18 jewels, mono-metallic compensation balance, adjusted to heat, cold, isochronism and 5 positions, precision regulator, soft iron movement cover, silvered dial, applied faceted baton numerals and luminous inserts, outer scale calibrated into 5ths, Dauphine hands with luminous inserts, water-resistant-type case stamped FB, case, dial and movement signed, associated 18k weave bracelet

The accompanying Extract from the Archives of Patek Philippe confirms that this watch was manufactured in 1956 and was sold on June 28th, 1957.