IWC Schaffhausen - Ingenieur

Ingenieur Perpetual Calendar Digital Date-Month

Titanium case, 45.0 mm. Made in Schaffhausen, Switzerland. Model IW381802
The Ingenieur Perpetual Calendar Digital Date-Month is the flagship of the Ingenieur family. The design, with its simple round case and the polished bezel, is inspired by the first generations of Ingenieur models from the 1950s and 1960s. This timepiece has a case measuring an imposing 45 millimetres made of titanium, and is limited to 100 individually numbered pieces. It has a slate-coloured dial and black hands with luminescence. The perpetual calendar displays the date and month in large digital displays on the dial, and is mechanically programmed to recognise the different lengths of the months and even adds a leap day at the end of February every four years. A chronograph with flyback function is an additional feature of the IWC-manufactured 89801-calibre movement. The rotor of the automatic winding system is made of solid 18-carat gold and can be seen through the transparent sapphire glass back.

In Stock. Includes GST and complimentary shipping.

Technical Specifications


89801 Calibre

Automatic, self-winding

68 hours Power Reserve

51 Jewels

Côtes de Genève, perlage


Black calfskin strap

Strap width 22 mm


Silver-plated dial with luminescence


Perpetual calendar with large double-digit displays for date and month and leap year display

Chronograph function with hours, minutes and seconds

Hour and minute counters combined in a totalizer at 12 o’clock

Flyback function

Sapphire glass, convex, antireflective coating on both sides

Small hacking seconds

Rotor with 18-carat gold medallion


Titanium case

Diameter 45.0 mm

Water resistance 12 bar

IWC Ingenieur PerpetualCalendarDigitalDateMonth IW381802 TechnicalSpecifications FINAL
IWC Ingenieur PerpetualCalendarDigitalDateMonth IW381802 TechnicalSpecifications FINAL

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