IWC
IWC Big Pilot's Watch Perpetual Calendar Spitfire IW503601
“Spitfire”
The IWC Big Pilot's Watch Perpetual Calendar Spitfire (reference IW503601) is a bronze watch with a green dial. It is water resistant to 60 m.
Specifications
Case
- Reference
- IW503601
- Nickname
- Spitfire
- Collection
- Big Pilot
- Case material
- Bronze
- Case shape
- Round
- Crystal
- Sapphire
- Water resistance
- 60 m
Dial and bezel
- Dial
- Green
Movement
- Movement
- Automatic
- Functions
- Perpetual calendar, Moon phase, Power reserve indicator
How it compares within the Big Pilot family
Side by side with other references in the same collection, from the catalog.
| Reference | Size | Material | Dial | Caliber | Years |
|---|---|---|---|---|---|
| IW503601 (This watch) | — | Bronze | Green | — | — |
| IW329301 | 43 mm | Stainless steel | Black | 82100 | 2021– |
| IW329303 | 43 mm | Stainless steel | Blue | 82100 | 2021– |
| IW329601 | — | Stainless steel | Blue | 82665 | 2026– |
| IW339601 | — | White ceramic | Blue | 82665 | 2026– |
| IW500401 | 46.2 mm | Stainless steel | Black | 51110 | 2006–2011 |
| IW500901 | 46.2 mm | Stainless steel | Black | 51111 | 2012–2016 |
| IW501019 | — | Titanium | — | — | 2023– |
| IW503101 | — | Ceramic | — | — | 2024– |
About the Big Pilot family
The Big Pilot's Watch goes back to 1940, when IWC made a large 55 mm watch for aviators that could be read easily in a cockpit. In 2002 IWC introduced a modern version, ref. 5002, with a 46 mm case, a cone-shaped crown and an in-house automatic caliber with Pellaton winding and a seven-day power reserve.
The family now includes perpetual calendars, special editions such as Le Petit Prince and Top Gun in ceramic, and the smaller Big Pilot's Watch 43 of 2021 with caliber 82100. Cases come in steel, bronze, ceramic, gold and other materials. Dealers identify the size, movement and edition from the reference and check the strap and papers.
Quick answers
- How water resistant is the IWC Big Pilot's Watch Perpetual Calendar Spitfire IW503601?
- It is water resistant to 60 metres.
- What is the IWC Big Pilot's Watch Perpetual Calendar Spitfire IW503601 made of?
- The case is bronze.
- What is the IWC Big Pilot's Watch Perpetual Calendar Spitfire IW503601 nicknamed?
- Dealers and collectors call it the “Spitfire”.
Catalog facts checked September 2026.