Patek Philippe & Co., Genève

18k, circular nickel lever movement, 18 jewels, mono-metallic compensation balance, adjusted to heat, cold, isochronism and 5 positions, two-tone silvered dial, baton and applied gold arabic numerals, unusual barrel fronted case with white gold topped sides and semi-hooded lugs, back with presentation inscription, case, dial and movement signed, with 18k white gold buckle, accompanied by an Extract from the Patek Philippe Archives.

The accompanying Extract from the Patek Philippe Archives confirms that this watch was manufactured in 1938 and sold on September 30th the same year. Production of reference 513 began in 1937.