Visionary technology: IWC Ingenieur Perpetual Calendar Digital Date Month
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Thread: Visionary technology: IWC Ingenieur Perpetual Calendar Digital Date Month

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  1. #1
    Watchuseek Editor
    Join Date
    Mar 2011

    Visionary technology: IWC Ingenieur Perpetual Calendar Digital Date Month

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    The race for high-tech materials is as fierce in watch making as it is in motor racing.

    Now for the first time ever, IWC Schaffhausen unveils a watch case made of titanium aluminide (TiAl). IWC was the first to introduce the use of titanium for the watch industry as a case material as early as 1980. In motor racing, titanium aluminide is used for pistons and valves: this is because the alloy is lighter and tougher than pure titanium and well suited to the extreme temperatures generated in the combustion chamber.

    Titanium aluminide is used widely in motorsport: the alloy is lighter and more robust than pure titanium. The black parts of the case are made of zirconium oxide, yet another material typically used in Formula One.

    The quick action switch

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    Modern racing cars have a boost button designed to provide maximum thrust when needed. In the case of the perpetual calendar with its digital date and leap year display, this job is handled by IWC’s revolutionary quick-action switch. Every night, when the date changes, this sophisticated mechanism siphons off a little energy, stores it and then discharges it precisely at the end of the month to rotate the display discs. At the end of the year, no fewer than five display discs need to be advanced synchronously.

    On New Year’s Eve, thanks to the three semi-transparent totalisers, the entire dial is set in motion. It is a spectacle of technical brilliance that no one who appreciates complex mechanical systems will want to miss. The transparent sapphire-glass back provides an unimpeded view of the IWC-manufactured 89802 calibre, whose rotor resembles the spokes on a light alloy wheel rim.

    Machining this high-performance material for case blanks is a considerable technological challenge. A team of specialists at IWC worked on it for 3 years until they mastered the process to perfection.

    Automatic double-pawl winding system

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    The innovative “watch-within-a-watch” was designed for the rapid, intuitive display of stop times between a minute and 12 hours. To turn this practical chronograph function into reality, the design engineers equipped the IWC-manufactured 89802 calibre with a particularly efficient automatic double-pawl winding system. The movement consists of 474 individual parts and can build up a power reserve of 68 hours.

    The rotor takes the shape of a wheel rim and can be seen through the transparent sapphire-glass back on the reverse side of the Ingenieur Perpetual Calendar Digital Date-Month. The attractive black rubber strap with textile inlay ensures that the watch is extremely comfortable to wear and has a long service life.


    Calibre 89802
    Frequency 28,800 A/h / 4 Hz
    Jewels 51
    Power reserve 68 h
    Winding automatic

    Materials case in titanium aluminide, black dial with sapphire-glass inlays, black rubber strap with textile inlay, pin buckle in titanium Glass sapphire, flat, antireflective coating on both sides
    Water-resistant 12 bar
    Diameter 46 mm
    Case height 17 mm

    Visit the IWC Ingenieur website
    niklasd and Sc00ter like this.

  2. #2
    Member Sc00ter's Avatar
    Join Date
    Dec 2011

    Re: Visionary technology: IWC Ingenieur Perpetual Calendar Digital Date Month

    Beautiful !

  3. #3
    Join Date
    Apr 2006
    NL, GMT+1

    Re: Visionary technology: IWC Ingenieur Perpetual Calendar Digital Date Month

    It's a magnificent watch. Very light and comfortable on the wrist, despite the size. Here are some shots I took at a watch event earlier this year:

    Kind regards,


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