In order to set the watch to another time zone, the wearer simply needs to push down the bezel, turn it to the desired time zone and let it go – the hour hand, 24-hour day/night display and the date automatically move with the bezel. The time zones that have daylight saving time are marked with a small “S” on the rotating bezel. To create the mechanism required for this complication, IWC’s engineers brought together three technologies. The first of these is the city ring found on the Pilot’s Watch Worldtimer, on which the name of each city stands for one of the international time zones. The second technology is the spring-mounted rotating bezel, first used in the Porsche Design Ocean 2000 from the 1980s, which can only be moved if pressure is applied simultaneously on two diametrically opposing sides. This prevents accidental resetting of the time zone. The third technology is the external/internal rotating bezel taken from the Aquatimer, which transmits the movement of the bezel via a differential gear to the hour wheel, 24-hour hand and date advance wheel.
Stainless steel case Diameter 46.0 mm Height 16.8 mm Screw in crown Water resistance 6 bar
89760 Calibre IWC-manufactured movement Automatic, self-winding 68 hours Power Reserve Frequency 28800.0 vph (4.0 hz) 323 Components 39 Jewels Côtes de Genève, perlage
Chronograph function with hours, minutes and seconds Hour and minute counters combined in a totalizer at 12 o’clock Flyback function 24-hour display for Worldtimer function Date display Glass secured against displacement by drop in air pressure Sapphire glass, convex, antireflective coating on both sides Small hacking seconds
Black dial with luminescence
Black calfskin strap by Santoni Strap width 22 mm