IWC
IWC Portugieser Chronograph IW371604
The IWC Portugieser Chronograph (reference IW371604) is a 41 mm stainless steel watch with a silver (gold-plated hands) dial. It runs on the automatic caliber 69355 with a 46-hour power reserve and is water resistant to 30 m. It was introduced in 2020 and is still in production.
Specifications
Case
- Reference
- IW371604
- Collection
- Portugieser
- Case size
- 41 mm
- Thickness
- 13.1 mm
- Case material
- Stainless steel
- Case shape
- Round
- Crystal
- Sapphire
- Water resistance
- 30 m
- Bracelet / strap
- Leather strap
Dial and bezel
- Dial
- Silver (gold-plated hands)
Movement
- Movement
- Automatic
- Caliber
- 69355
- Power reserve
- 46 hours
- Frequency
- 28,800 vph
- Jewels
- 27
- Functions
- Chronograph, Small seconds
Production
- Production
- 2020 – today (current)
How it compares within the Portugieser family
Side by side with other references in the same collection, from the catalog.
| Reference | Size | Material | Dial | Caliber | Years |
|---|---|---|---|---|---|
| IW371604 (This watch) | 41 mm | Stainless steel | Silver (gold-plated hands) | 69355 | 2020– |
| IW358304 | 40.4 mm | Stainless steel | Silver (blue hands) | 82200 | 2020– |
| IW358305 | 40.4 mm | Stainless steel | Blue | 82200 | 2020– |
| IW358310 | 40.4 mm | Stainless steel | Green | 82200 | 2020– |
| IW358313 | 40.4 mm | Stainless steel | Salmon | 82200 | 2020– |
| IW371606 | 41 mm | Stainless steel | Blue | 69355 | 2020– |
| IW371615 | 41 mm | Stainless steel | Green | 69355 | 2020– |
| IW371617 | 41 mm | Stainless steel | Silver (blue hands) | 69355 | 2020– |
| IW503703 | 44.4 mm | 18k white gold | Ice blue | 52616 | 2024– |
About the Portugieser family
The Portugieser began in the late 1930s, when two Portuguese merchants asked IWC for a wristwatch as precise as a marine chronometer. IWC fitted a pocket-watch movement into a large wristwatch case, which gave the line its size and its clean, railway-track dial.
The modern family includes the Portugieser Chronograph, first introduced in the 1990s and updated in 2020, the Portugieser Automatic with a seven-day power reserve, perpetual calendars, minute repeaters and tourbillons. Calibers in the catalog include the 52010 and 51011. Dealers identify the generation and metal from the reference and check the dial, strap and papers.
Quick answers
- What size is the IWC Portugieser Chronograph IW371604?
- The IWC Portugieser Chronograph IW371604 has a 41 mm case, 13.1 mm thick.
- What movement does the IWC Portugieser Chronograph IW371604 use?
- It uses the automatic caliber 69355, with a 46-hour power reserve.
- How water resistant is the IWC Portugieser Chronograph IW371604?
- It is water resistant to 30 metres.
- Is the IWC Portugieser Chronograph IW371604 still in production?
- Yes, it is a current reference.
- When did the IWC Portugieser Chronograph IW371604 come out?
- It was introduced in 2020.
- What is the IWC Portugieser Chronograph IW371604 made of?
- The case is stainless steel. Bracelet or strap: Leather strap.
Catalog facts checked September 2026.