324 S QA LU 24H/303

About the Patek Philippe 324 S QA LU 24H/303

It builds Patek's patented annual calendar, which knows the length of every month except February, onto the 324 S C base: 347 parts, 34 jewels, a Gyromax balance beating at 28,800 vph for a 45-hour reserve, at 33.3 mm across, carrying the Patek Philippe Seal. The day and month sit in windows under 12 o'clock, the date at 6 with the moon, and the 24-hour dial beside it. The glossary defines the annual calendar.

In the library it powers 13 Complications references, the 5396 in rose and white gold at 38.5 mm and 38 mm, and 4 Nautilus 5726 references at 40.5 mm. 2 are limited editions.

The 324 S QA LU and 324 S IRM QA LU are the other annual calendars on the same base, and the 240 Q the perpetual calendar on the ultra-thin 240.