Originally envisioned by Gérald Genta and reimagined for the modern era, the Ingenieur collection has long stood for engineering excellence, bold design and technical mastery. The Ingenieur Perpetual Calendar 41, Reference IW344903, elevates this legacy with a sophisticated 41 mm stainless steel case, the signature round bezel with five polygonal screws, and an integrated H-link bracelet that blends polished and satin-brushed finishes.

Its silver-plated dial features the collection’s signature grid structure and an exceptionally balanced layout of perpetual calendar indications. Displays for the date, day, month, leap year, and IWC’s double moon phase remain perfectly synchronised through the ingenious Pellaton-driven 89900 calibre. The mechanical perpetual calendar automatically accounts for the length of each month and leap years, requiring no adjustment until the year 2100. With water resistance to 10 bar and a see-through sapphire caseback revealing the beautifully finished movement, this model brings together mechanical complexity and contemporary sports-watch design.

Technical Details

Case – Stainless steel case

Diameter – 41.0 mm

Height – 13.9 mm

Dial – Silver-plated with grid structure

Caseback – See-through sapphire glass back

Crown – Screw-in crown with crown protection

Water Resistance – 10 bar

Calibre – IWC-manufactured 89900 calibre

Movement Type – Automatic winding

Power Reserve – 76 hours

Frequency – 28,800 VPH (4 Hz)

Components – 358

Jewels – 51

Features – Perpetual calendar with date, day, month and leap year; Double moon phase display; Flyback chronograph function; Pellaton winding system with ceramic components; Sapphire glass with antireflective coating on both sides; Central hacking seconds; Glass secured against displacement by drop in air pressure

Bracelet – Integrated stainless steel H-link bracelet with butterfly folding clasp