IWC unveils the Ingenieur Perpetual Calendar 41 IW344903

0 0 Wednesday, 2 April 2025 Edit this post

IWC keeps expanding its Ingenieur line. Among various novelties presented at Watches and Wonders Geneva 2025, the Schaffhausen-based brand has unveiled the Ingenieur Perpetual Calendar 41 ref. IW344903.

IWC Ingenieur Perpetual Calendar 41 IW344903

This model marks the Swiss luxury watch manufacturer’s first stainless steel model to combine the Gérald Genta-inspired Ingenieur design with the perpetual calendar developed by Kurt Klaus.

Framed by a 41.6 mm x 13.4 mm case with a distinctive bezel secured by five functional screws, the blue dial stands out with its signature 'Grid' pattern and three sunray-finished subdials, whose outer edges feature a refined azurage.

After colouring, the subdials are pad-printed with the calendar display information.

The subdial at the 3 o’clock position indicates the date, while the one at 6 o’clock combines the month with the perpetual moon phase.

Thanks to a reduction gear train using two intermediate wheels, the moon phase display will only deviate by one day after 577.5 years.

In addition to showing the day of the week, the subdial at 9 o’clock features a small leap year indicator, which counts down the years to the next leap year. In the case of a leap year, the calendar will automatically insert a 29th day at the end of February.

All these displays are synchronised with each other and can be advanced simply by turning the crown, engraved with “Probus Scafusia”, which translates as “Solid Craftsmanship from Schaffhausen”. The Latin motto was coined in 1903 by IWC’s then-director Johannes Rauschenbach-Schenk.

The rhodium-plated hour and minute hands, along with the hand-applied markers, are treated with Super-LumiNova for enhanced legibility in low-light conditions.

Seamlessly integrated into the case via a middle-link attachment, the H-link bracelet with a butterfly clasp ensures optimal comfort.

Case and bezel feature a combination of satin-finished and polished surfaces, along with polished outer edges. The middle links of the bracelet are polished.

The polished case back ring encloses a sapphire crystal showcasing the IWC-manufactured 82600 calibre operating at a frequency of 4 Hz (28,800 vibrations per hour).

The automatic Pellaton winding system uses movements of the oscillating mass in both directions to efficiently convert the wearer’s arm movements into potential energy for the mainspring, building up a power reserve of 60 hours.

Components that are subject to high stress are made of virtually wear-free zirconium oxide ceramic, one of the hardest materials on Earth. The automatic wheel and the clicks are made of black ceramic, while the rotor bearing is made of white ceramic. The movement features an elaborate finishing with circular graining, Geneva stripes, and blued screws,