What it is
The 26-330 S C (often shortened to "26-330") is Patek Philippe's current main automatic caliber for time-and-date watches with a central rotor. Announced in 2021 with the limited-edition Nautilus 5711/1A-014 olive-green dial, it is a clean-sheet successor to the long-serving Cal. 324 S C (2004-2021). The architecture is recognisably Patek (Gyromax balance, Spiromax silicon hairspring, 21-kt gold central rotor, 4 Hz, 27 mm diameter, Patek Philippe Seal), but with a longer reserve (45 vs 35-45 h depending on 324 variant), a redesigned gear train, and the headline addition: hacking seconds.
What changed vs the 324
Hacking seconds: pulling the crown to the time-setting position now stops the seconds hand for precise synchronisation. The 324 famously did not hack — for two decades, modern Patek owners had to set their watch by waiting for the second hand to coast to the desired minute mark. Adding the hack mechanism was the most-requested change from owners and dealers. 45-hour reserve: extended from 35-45 h variant range. Revised gear train: more efficient torque transmission, contributing to the longer reserve. Upgraded Spiromax: refined hairspring geometry. 30 jewels (vs 29 on the 324). The visual layout and Patek Philippe Seal certification carry over unchanged.
Where it appears
The 26-330 launched in the Nautilus 5711/1A-014 olive-green (2021, ~170 pieces, the final Nautilus 5711 reference and the most-collected modern Patek). It then appeared in the Aquanaut 5168G (2022, 42 mm white-gold), the Aquanaut 5167A (transitioning from 324 to 26-330 in mid-2022 production), the Calatrava 6196P platinum (2024), and progressively across the catalogue as Patek phases out 324-equipped references. By 2026 most current-production Patek time-and-date references run the 26-330 or one of its complication derivatives (annual calendar, dual time, etc.).
How "26-330" parses
Patek caliber numbers encode the architecture. 26: the 26 mm "ligne" measurement category (Patek's smaller-diameter automatics). 330: the specific architecture variant within that category. S: self-winding. C: with central seconds. The 26-330 sits in the same naming family as the older Cal. 324 S C (which was Patek's previous-generation 27 mm automatic). Variants will follow with calendar suffixes (the way the 324 spawned 324 S QA LU 24H for annual calendar, 324 S IRM QA LU for power-reserve-and-annual-calendar, etc.). Expect a 26-330 S QA LU 24H within a few years for the next-generation Annual Calendar.
Service notes
Service for a 26-330-equipped Patek runs USD 1,500-2,500 at Patek service (Geneva, New York, or authorised partners), with a 2-year warranty. Recommended interval: 3-5 years by Patek (in practice many owners stretch to 7-10). The Patek Philippe Seal commitment guarantees parts and service for the lifetime of the watch. As a 2021-launched caliber, the 26-330 is at the early end of its service-history curve; long-term observed accuracy and wear data will accumulate over the next decade. Expect Patek's usual very-tight regulation tolerance: -3/+2 sec/day across positions, the in-house standard that exceeds COSC.
