Patek Philippe. An 18k Gold Automatic Wristwatch
Case No: 26xxxxx
Movement No: 11xxxxx
Cal. 27-460 automatic movement stamped with the Geneva Seal, 37 jewels, 18k gold rotor, silvered matte dial, applied elongated baton numerals, outer minute divisions, subsidiary dial for constant seconds, circular water-resistant case, screw back, case, dial, and movement signed
In 1960 Patek Philippe launched the automatic reference 3429, replacing the reference 3415. Most examples were cased in yellow gold, with a few examples in white gold. The reference was produced for nine years, ending in 1969. It was fitted with the caliber 27-460, which evolved from Patek Philippe’s first automatic caliber 12-600.
The caliber 27-460 (and with calendar 27-460M) is recognized as one of the finest Swiss automatic movements produced, both in construction and in finish. The caliber 12-600AT was Patek Philippe’s first automatic movement, and subsequently developed several problems with the winding system. In fixing these problems, Patek Philippe added a ball bearing and several jewels, and upgraded to a Gyromax balance wheel. They also found that the movement needed to be attached to the case in three places to keep it and the winding rotor in place. In 1960, Patek Philippe released this upgraded movement as the caliber 27-460. The movement was in production through the mid-1980’s, and also used by the manufacture as the base for more complicated watches, being replaced by the caliber 240 in 1985.
While Patek Philippe has continued to improve upon their base calibers, for many a watch with the caliber 27-460 is the epitome of quality. The present reference 3429, with simple and elegant dial design, water resistant case, and efficient and high-quality caliber 27-460 is an excellent example of a classic time-only Patek Philippe.