Patek Philippe
Patek Philippe Annual Calendar Chronograph 5905/1A-001
The Patek Philippe Annual Calendar Chronograph (reference 5905/1A-001) is a 42 mm stainless steel watch with a olive green dial. It runs on the automatic caliber CH 28-520 QA 24H with a 55-hour power reserve and is water resistant to 30 m. It was introduced in 2021 and is still in production.
Specifications
Case
- Reference
- 5905/1A-001
- Collection
- Complications
- Case size
- 42 mm
- Thickness
- 14.03 mm
- Case material
- Stainless steel
- Case shape
- Round
- Crystal
- Sapphire
- Water resistance
- 30 m
- Bracelet / strap
- Stainless steel bracelet
Dial and bezel
- Dial
- Olive green
Movement
- Movement
- Automatic
- Caliber
- CH 28-520 QA 24H (base CH 28-520)
- Power reserve
- 55 hours
- Frequency
- 28,800 vph
- Functions
- Flyback chronograph, Annual calendar, Day-date
Production
- Production
- 2021 – today (current)
How it compares within the Complications family
Side by side with other references in the same collection, from the catalog.
| Reference | Size | Material | Dial | Caliber | Years |
|---|---|---|---|---|---|
| 5905/1A-001 (This watch) | 42 mm | Stainless steel | Olive green | CH 28-520 QA 24H | 2021– |
| 4947/1A-001 | 38 mm | Stainless steel | Blue | 324 S QA LU | 2021– |
| 5172G-001 | 41 mm | 18k white gold | Blue | CH 29-535 PS | 2019– |
| 5205R-011 | 40.2 mm | 18k rose gold | Olive green | 26-330 S QA LU 24H | 2022– |
| 5230P-001 | 38.5 mm | Platinum | Blue | 240 HU | 2022– |
| 5370R | 41 mm | Rose gold | Brown | CHR 29-535 PS | 2025– |
| 5396G-017 | 38.5 mm | 18k white gold | Blue gradient | 26-330 S QA LU 24H | 2024– |
| 5924G | 42 mm | White gold | — | CH 28-520 C FUS | 2023– |
| 5935A-001 | 41 mm | Stainless steel | Salmon | CH 28-520 HU | 2022– |
About the Complications family
Complications is Patek Philippe's catalog heading for useful everyday functions that stop short of the grand complications. It covers the annual calendar, which Patek introduced in 1996 with ref. 5035 and which needs correcting only once a year, the World Time with its city ring, Travel Time models with two hour hands, chronographs, moon phases and alarms.
References in the catalog include annual calendars such as the 5205 and 5396, World Times such as the 5230 and the enamel-dial 5231, and the Calatrava Pilot Travel Time models. Calibers include versions of the 240, 324 and 26-330 families. For dealers the exact reference and dial variant matter most, as the same function often comes in several metals and dial colours that trade differently.
Quick answers
- What size is the Patek Philippe Annual Calendar Chronograph 5905/1A-001?
- The Patek Philippe Annual Calendar Chronograph 5905/1A-001 has a 42 mm case, 14.03 mm thick.
- What movement does the Patek Philippe Annual Calendar Chronograph 5905/1A-001 use?
- It uses the automatic caliber CH 28-520 QA 24H, with a 55-hour power reserve.
- How water resistant is the Patek Philippe Annual Calendar Chronograph 5905/1A-001?
- It is water resistant to 30 metres.
- Is the Patek Philippe Annual Calendar Chronograph 5905/1A-001 still in production?
- Yes, it is a current reference.
- When did the Patek Philippe Annual Calendar Chronograph 5905/1A-001 come out?
- It was introduced in 2021.
- What is the Patek Philippe Annual Calendar Chronograph 5905/1A-001 made of?
- The case is stainless steel. Bracelet or strap: Stainless steel bracelet.
Catalog facts checked September 2026.