IWC
IWC Portugieser Hand-Wound Tourbillon IW545801
The IWC Portugieser Hand-Wound Tourbillon (reference IW545801) is a 42.4 mm 18k Armor Gold watch with a silver dial. It runs on the manual caliber 81905 with a 84-hour power reserve and is water resistant to 60 m.
Specifications
Case
- Reference
- IW545801
- Collection
- Portugieser
- Case size
- 42.4 mm
- Thickness
- 10.8 mm
- Case material
- 18k Armor Gold
- Case shape
- Round
- Crystal
- Sapphire
- Water resistance
- 60 m
- Bracelet / strap
- Leather strap
Dial and bezel
- Dial
- Silver
Movement
- Movement
- Manual
- Caliber
- 81905
- Power reserve
- 84 hours
- Frequency
- 28,800 vph
- Jewels
- 20
- Functions
- Flying tourbillon
Production
- Production
- Current
Dial versions
This reference was made with these dials and finishes.
IW545801 Silver
Silver-plated dial
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 |
|---|---|---|---|---|---|
| IW545801 (This watch) | 42.4 mm | 18k Armor Gold | Silver | 81905 | — |
| 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– |
| IW371604 | 41 mm | Stainless steel | Silver (gold-plated hands) | 69355 | 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 Hand-Wound Tourbillon IW545801?
- The IWC Portugieser Hand-Wound Tourbillon IW545801 has a 42.4 mm case, 10.8 mm thick.
- What movement does the IWC Portugieser Hand-Wound Tourbillon IW545801 use?
- It uses the manual caliber 81905, with a 84-hour power reserve.
- How water resistant is the IWC Portugieser Hand-Wound Tourbillon IW545801?
- It is water resistant to 60 metres.
- Is the IWC Portugieser Hand-Wound Tourbillon IW545801 still in production?
- Yes, it is a current reference.
- What is the IWC Portugieser Hand-Wound Tourbillon IW545801 made of?
- The case is 18k Armor Gold. Bracelet or strap: Leather strap.
Catalog facts checked October 2026.