Free tools Windows power users keep installed
One-click scans. No signup required.
IWC introduced the stainless-steel Ingenieur Perpetual Calendar 41, reference IW344903, at Watches and Wonders Geneva on 1 April 2025. It brings the brand’s perpetual calendar into the Genta-inspired Ingenieur design, pairing a blue Grid-pattern dial and integrated steel bracelet with IWC’s self-winding calibre 82600. The specifications below are confirmed by IWC; this launch-focused introduction does not claim firsthand wearing impressions.
What is the steel IWC Ingenieur Perpetual Calendar 41?
IW344903 is the stainless-steel version of the Ingenieur Perpetual Calendar 41. IWC’s launch announcement described it as the first stainless-steel model to combine the Ingenieur design with the perpetual calendar developed by Kurt Klaus. The watch was introduced at Watches and Wonders Geneva on 1 April 2025. IWC’s launch announcement gives the launch context and design details.
The launch release calls the case 41 mm across, while the official European product page lists the more precise diameter as 41.6 mm. For a specification, 41.6 mm is the figure to use; 41 mm is the rounded description in the release.
IW344903 specifications
| Specification | IWC listing |
|---|---|
| Reference | IW344903 |
| Case and bracelet | Stainless steel, with satin-finished and polished surfaces described in the launch release |
| Diameter | 41.6 mm on IWC’s European product page |
| Height | 13.3 mm on IWC’s European product page |
| Dial | Blue, with the Ingenieur’s Grid pattern |
| Movement | IWC-manufactured automatic calibre 82600 |
| Calendar indications | Date, day, month, leap year, and perpetual moon phase |
| Water resistance | 10 bar, as stated by IWC; this figure is not a swimming or diving guarantee |
| Crystal and case back | Convex sapphire glass with antireflective coating on both sides; sapphire-glass case back |
What the calendar displays
The calendar is spread across three subdials. IWC specifies displays for the date, day of the week, month, leap year, and perpetual moon phase. The launch release groups the principal indications as date, day, month, and moon phase; the product page also explicitly lists the leap-year indication.
#1 Best Overall
- Model IW391031
These are the confirmed display functions, not a guide to setting or correcting the calendar. The cited product information does not establish a correction procedure, so owners should consult the watch’s documentation for operating instructions.
Calibre 82600 and visible movement details
IWC identifies the movement as its automatic, self-winding 82600 calibre. The company says it uses a Pellaton winding system and ceramic components, and that the movement can be viewed through the sapphire-glass case back. Those construction details are IWC’s own description in its 1 April 2025 launch release; the cited material does not provide further performance measurements.
Rank #2
- Brand new top quality, easy to adjust the length to fit the wrist, one size fits all.
- Material: High Density Nylon , Sweat and Breathable environmentally friendly and healthy, moderate softness, very comfortable to wear.
- Moderate softness, very comfortable to wear, molded, strong and durable, wear-resistant strap/wristband, suitable for original watch.
- There are tools included in the package to help you easily insert and remove the strap, perfect for you to modify your watch.
- Exquisite packaging with exquisite workmanship and stylish design is a perfect gift for friends and family.
European price and availability
IWC’s European product page displayed a price of €42,600 including VAT when consulted in 2026. This is a regional, time-sensitive listed price, not a universal price or confirmation of a particular offer. Check the product page for current price and availability in your market.
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.How the titanium sibling differs
In a separate announcement dated 14 April 2026, IWC introduced a titanium Ingenieur Perpetual Calendar 41, reference IW344904. The titanium announcement specifies a grade 5 titanium case and integrated bracelet and a matte grey dial, distinguishing it from the steel IW344903’s stainless-steel construction and blue dial. IWC’s titanium announcement establishes those details.
Rank #3
- Brand new top quality, easy to adjust the length to fit the wrist, one size fits all.
- Material: High Density Nylon , Sweat and Breathable environmentally friendly and healthy, moderate softness, very comfortable to wear.
- Moderate softness, very comfortable to wear, molded, strong and durable, wear-resistant strap/wristband, suitable for original watch.
- There are tools included in the package to help you easily insert and remove the strap, perfect for you to modify your watch.
- Exquisite packaging with exquisite workmanship and stylish design is a perfect gift for friends and family.
The two references are distinct models, not alternate names for the same watch. The cited announcements do not establish a like-for-like comparison of their live prices, stock, dimensions, weight, or wearing comfort.
Quick Recap
Best Value
- Brand new top quality, easy to adjust the length to fit the wrist, one size fits all.
- Material: High Density Nylon , Sweat and Breathable environmentally friendly and healthy, moderate softness, very comfortable to wear.
- Moderate softness, very comfortable to wear, molded, strong and durable, wear-resistant strap/wristband, suitable for original watch.
- There are tools included in the package to help you easily insert and remove the strap, perfect for you to modify your watch.
- Exquisite packaging with exquisite workmanship and stylish design is a perfect gift for friends and family.
Rank #4
- Brand new top quality, easy to adjust the length to fit the wrist, one size fits all.
- Material: High Density Nylon , Sweat and Breathable environmentally friendly and healthy, moderate softness, very comfortable to wear.
- Moderate softness, very comfortable to wear, molded, strong and durable, wear-resistant strap/wristband, suitable for original watch.
- There are tools included in the package to help you easily insert and remove the strap, perfect for you to modify your watch.
- Exquisite packaging with exquisite workmanship and stylish design is a perfect gift for friends and family.
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.
