IWC Big Pilot's Watch, round 18kt white gold case (46.2mm diameter, 15.8mm thickness) with screw-down crown, soft-iron inner case for protection against magnetic fields up to 80,000 A/m, dark brown alligator leather strap, ardoise gray dial with luminous hands and Arabic numerals, Glucydur beryllium alloy balance with high-precision adjustment cam on balance arms, central hacking seconds hand, power reserve display at 3 o'clock, date display at 6 o'clock, 42 jewel Caliber 51111 self-winding mechanical movement with 7 day power reserve, convex scratch-resistant sapphire crystal secured against displacement by drop in air pressure, water resistant to 60 meters.
Since 2002, the Big Pilot?s Watch has been IWC?s flagship. Its IWC-manufactured 51111 calibre-one of the largest automatic movements in the world-contains all the features that have proved their worth in the long history of IWC mechanical watches. Within no time at all, the automatic movement generates a power reserve of 8.5 days, but only runs for 7 days before being mechanically stopped by an ingenious little train in the power reserve. This eliminates the fall-off in torque that occurs as the mainspring winds down, which could lead to loss of amplitude in the balance and unacceptable inaccuracies in the rate.
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