Patek Philippe
Calibre CH 28-520 QA 24H
Automatic chronograph
Specifications
- Maker
- Patek Philippe
- Type
- Automatic chronograph
- In-house
- Yes
- Power reserve
- up to 55 h
- Frequency
- 28,800 vph (4 Hz)
Sources
- Official Patek Philippe retrieved October 16, 2026
Used in
| Watch | Ø | Thickness | Lug-to-lug |
|---|---|---|---|
| Patek Philippe Complications 5905/1A (annual calendar, chronograph) 5905/1A-001 | 42 mm | 14.13 mm | — |
| Patek Philippe Complications 5905R (annual calendar, chronograph) 5905R-010 | 42 mm | 14.03 mm | — |