26‑330 S QA LU 24H

The self-winding 26-330 S QA LU 24H caliber features a patented annual calendar with day, date, and month apertures, plus moon-phase, 24-hour, and sweep seconds displays. Measuring 32.6 mm by 5.8 mm, it comprises 339 components and 34 jewels. It operates at 28,800 semi-oscillations per hour (4 Hz) with a 35 to 45-hour power reserve. Winding is provided by a 21K gold central rotor, with regulation by a Gyromax balance and Spiromax balance spring, all certified by the Patek Philippe Seal.