The IWC Pilot’s Watch Chronograph 41 Bronze (IW388109) pairs a blue dial and textile strap with a bronze case, crown and pushers designed to develop a patina. Its 41 mm case houses IWC’s automatic caliber 69385 chronograph, and the supplied strap uses IWC’s EasX-CHANGE attachment system. Here are the official specifications and what hands-on reviewers report about wearing it.
What is the IW388109?
IW388109 is IWC’s Pilot’s Watch Chronograph 41 in bronze, with a blue dial. IWC describes the case, crown and pushers as bronze and says the material develops a patina over time. The reference appears on IWC’s past-collections page, which confirms its specifications but does not establish current availability.
The bronze look is meant to change rather than remain uniform. A retailer, Watches of Switzerland, says the alloy includes copper, aluminium and iron and is around 50 per cent harder than standard bronze. That composition and hardness figure are the retailer’s claims; IWC’s product page does not give those material details.
IW388109 specifications
| Specification | IW388109 |
|---|---|
| Case and dial | Bronze case, crown and pushers; blue dial (IWC, accessed 2026-10-08) |
| Case diameter | 41 mm (IWC, accessed 2026-10-08) |
| Case height | 14.5 mm (IWC, accessed 2026-10-08) |
| Water resistance | 10 bar (IWC, accessed 2026-10-08) |
| Crystal | Convex sapphire with antireflective coating on both sides; case back with synthetic sapphire crystal (IWC, accessed 2026-10-08) |
| Crown | Screwed in (IWC, accessed 2026-10-08) |
| Strap and widths | Blue textile strap with EasX-CHANGE; 20 mm strap width and 18 mm buckle width (IWC, accessed 2026-10-08) |
| Movement | IWC-manufactured automatic caliber 69385 (IWC, accessed 2026-10-08) |
| Power reserve | 46 hours (IWC, accessed 2026-10-08) |
| Frequency | 28,800 vibrations per hour (4 Hz) (IWC, accessed 2026-10-08) |
| Movement construction | 242 components and 33 jewels (IWC, accessed 2026-10-08) |
| Functions | Day and date, small hacking seconds, and chronograph hours, minutes and seconds (IWC, accessed 2026-10-08) |
How it wears
Monochrome’s hands-on review describes the supplied textile strap as supple and the watch as comfortable and not too large on the reviewer’s wrist. Those are subjective impressions, not a fit guarantee: the source does not provide a quantified wrist size or a broader wearer survey.
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The case is 41 mm across and 14.5 mm high according to IWC. A 2023-08-22 description from The 1916 Company gives 51.6 mm lug-to-lug and 14.6 mm thickness. The thickness differs from IWC’s listed height by 0.1 mm; these are attributed published measurements, not independent measurements made for this article.
Caliber 69385 and chronograph
IWC specifies an automatic, manufactured caliber with a 46-hour reserve and a chronograph displaying elapsed hours, minutes and seconds. The listed 28,800 vibrations per hour equals 4 Hz; the movement has 242 components and 33 jewels. IWC also lists a small hacking seconds function, which stops the seconds hand when the crown is pulled for setting.
Rank #2
- Modern, pilot-inspired Promaster timepieces equipped for professional use to discover the world from high above.
- Synchronized to Atomic Time Clock for Superior Accuracy, Atomic Timekeeping Technology with Synchronized Time Adjustment Available in 24 Time Zones, 1 Second Chronograph Measures up to 60 Minutes, Perpetual Calendar, 12/24 Hour Time, Alarm, Power Reserve Indicator, Day / Date
- Silver-Tone Stainless Steel
- Sapphire Crystal
- 200 Meters Water Resistant and 5 Year Limited Warranty
Watches of Switzerland says the chronograph can time up to 12 hours and that caliber 69385 uses a column wheel. Those construction details come from the retailer; IWC’s product page confirms the chronograph but does not state the column-wheel architecture.
Strap attachment and water resistance
The included blue textile strap uses IWC’s EasX-CHANGE system. IWC says additional straps can be purchased, but the 20 mm width alone does not establish that an ordinary strap will fit this proprietary attachment. Confirm the connection and reference with IWC or an authorized retailer before buying a replacement.
Rank #3
- Timeless styling that effortlessly takes you from work to play.
- 1 Second Chronograph Measures up to 60 Minutes, 12/24 Hour Time, Date
- Silver-Tone Stainless Steel
- Sapphire Crystal
- 100 Meter Water Resistant and 5 year Limited Warranty
IWC lists 10 bar water resistance and a screwed-in crown. These are the manufacturer’s specifications; the product page does not provide usage instructions for particular activities, so follow IWC’s care guidance for the watch rather than treating the rating as a blanket guarantee for every circumstance.
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.Availability and what is not established
IWC’s page classifies the model within past collections. It does not establish whether the watch is currently in stock, its current price in any country, or the availability of a specific replacement strap. Check IWC or an authorized retailer in your market for current stock, pricing and accessory compatibility.
Quick Recap
Best Value
- Stainless Steel Bracelet Watch
- Quartz
- Japanese-quartz Movement
- Case Diameter: 40mm; Operating Temp.: -10°C to +60°C
- Water resistant to 100m (330ft): in general, suitable for swimming and snorkeling, but not diving
Rank #4
- Men's luxury timepieces with technical advancements and a sporty style
- 1 Second Chronograph Measures up to 60 Minutes, 12/24 Hour Time, Date
- Silver-Tone Stainless Steel Case
- Mineral Crystal
- 100 Meters Water Resistant and 5 Year Limited Warranty
Sources
- IWC: Pilot’s Watch Chronograph 41 IW388109 — official product specifications; page accessed 2026-10-08.
- Watches of Switzerland: IWC Pilot’s Watch Chronograph 41 Bronze — retailer material and movement details.
- Monochrome: IWC Pilot’s Watch Chronograph 41 Bronze IW388109 hands-on review — subjective wearing impressions.
- The 1916 Company video description, 2023-08-22 — attributed lug-to-lug and thickness measurements.
Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon at the time of purchase will apply.
