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Hi Tim of Govberg and welcome to the world of IWC. Today, we will be discussing the use, care, and maintenance of the IWC Big Pilot's Watch, reference 5009-12. This automatic winding timepiece, when fully energized, features a 168 hour power reserve or 7 days. Should the watch run down, unscrew the crown from it's set position, flush against the case, and in the first position, wind in a clockwise fashion to energize the power reserve of the timepiece. The radial power reserve indicator at 3 o'clock, will inform you of how much energy is in the main spring barrel. It's also important to note that the watch will wind itself automatically, using the kinetic energy of the wrist, so once the second hand is seen advancing, the watch can be put on the wrist and worn, and it will continue to top off it's power reserve autonomously.

As an automatic winding timepiece, it's important to note, the Big Pilot's Watch, reference 5009-12 cannot be over-wound. It's important to focus on 2 refinements that can assist in setting the time and the date of the watch. The first is a hacking seconds function, such that when the crown is pulled out to extremity, the seconds hand halts, the balance stops beating, and the watch can now be set precisely to a known accurate reference time such as an atomic clock. Furthermore, the watch features, in the second crown position, a quick set date, such that the date indicator at 6 o'clock can be rapidly cycled should the watch run down or encounter an irregular length month. It is important to note, however, that the quick set date function should never be engaged during the period between 9pm and 3am, when the date change mechanism is engaged as manually advancing the date during this period can damage the movement.

It's important to note that the crown, after every instance of use, should be threaded down into it's position, flush against the case. This is essential to ensure the factory rated hermiticity of the watch, which is rated to 6ATM or 60 meters. IWC explicitly approves 6ATM water resistant watches for use in swimming and water sports. However, it is important to note that no IWC leather straps are water resistant. Leather is a natural, porous material that will absorb moisture and age in accelerated fashion if exposed to water. For water use, put this watch on a textile strap, available from IWC.

It's also important to note that water resistance is a fluid concept, very much dependent on the owner's usage of the watch, as well as proper attention to water testing intervals. The crown should always be screwed down, both for protection against impact and abrasion, and to ensure the 6ATM water resistance of the watch. Moreover, the crown should never be screwed out and none of the functions should be activated when the crown is wet or the watch is submerged as this can bypass the seals and introduce water into the case. Should condensation ever be seen on the dial, immediately take the watch to an authorized IWC boutique or dealer service center for immediate remedial attention to protect the cosmetic and functional integrity of the timepiece.

It's also important to note that should the watch be used in salt water or water with extensive chemical additives, such as chlorine, that the timepiece should be cleaned and dried off afterwards. Finally, water resistance, as set by the factory, is not a static feature of the watch. It changes over time as seals age and lubricants age and everything from the case back seal to the crown seals, to the gasket for the bezel should be tested on an annual basis. This can be done at any IWC authorized retailer or their independent authorized dealer or factory boutique. Again, annual check up of water resistance is highly recommended by IWC.

It's also important to note that magnetism can play a factor in the proper chronmetric performance of your timepiece. IWC Pilot's watches do feature a soft, iron, inner paramagnetic shell to channel field lines away from the movement and it's hair spring. However, should the watch become magnetized or should you suspect the watch has become magnetized, take it to an authorized dealer or boutique where specialized equipment is available to demagnetize the timepiece.

Finally, the sophisticated manufacture movement inside this timepiece requires a service approximately every 2 to 5 years by the recommendations of IWC. This will ensure both the continued investment value as well as the performance of your timepiece, provided service is performed exclusively at an IWC authorized retailer such as an independent dealer or IWC factory boutique. Only these authorized outlets have the necessary trained personnel, specialized equipment, and original IWC factory parts to protect the value and performance of your IWC timepiece.

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