Patek Philippe 324 S QA LU 24H
High confidenceThe Annual Calendar was Patek's own invention and patent: a calendar that knows 30- and 31-day months and needs correcting only once a year, at the end of February. That is the functional test — a watch presented as an annual calendar that requires correcting at the end of every short month is a complete calendar, not an annual one, and the two are commonly conflated in listings.
Specifications
- Movement manufacturer
- Patek Philippe
- Frequency
- 28,800 vph (4 Hz)
- Winding
- automatic
- Complications
- Centre seconds · Annual calendar · Moon phase · 24-hour indication
Architecture
The 324 carrying an annual calendar module with moon phase and a 24-hour indication. QA denotes quantième annuel, LU lune.
Related calibers
Built on
Patek Philippe 324 S C
References using this caliber
- Patek Philippe 5726/1A-014Factory
Nautilus · Whole production
Provenance of this record
Sources & Evidence
Primary sourceManufacturer documentation
Patek Philippe — collection, caliber and Patek Philippe Seal documentation
Patek Philippe SA
- Accessed
- 2026-08-18
Cited for
This referenceHigh confidence
Last verified: Not yet reviewed