Patek Philippe & Co., Genève

damascened nickel lever movement, stamped twice with the seal of Geneva, 23 jewels, bi-metallic compensation balance, 8 adjustments, precision regulator, silvered dial, applied pink gold roman and baton numerals, two subsidiary dials for constant seconds and 30-minute register, outer tachometer scale, circular case with grained sides, polished faceted bezel, unusual flattened oval polished and grained lugs, case, dial and movement signed, with an 18k gold Patek Philippe 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 1941 and sold on October 17th, 1942.

Production of reference 591 began in 1938. Considerably rarer than the reference 130, its case is  distinguished by its unusual flattened oval lugs. For a similar example, see Huber, M., Banbery, A., Patek Philippe Wristwatches, Vol.2, Second Edition, p.266, pl.411.