Moving up in complexity is the Big Pilot's Watch Perpetual Calendar Top Gun Ceratanium, which marks its own milestone as the first IWC watch to use Ceratanium not only for the case and crown but also for the bracelet, which due to its use of the proprietary material is 30 percent lighter than a steel bracelet and engineered for maximum wearing comfort. Like the perpetual calendars that preceded it in this year's fleet of new Pilot's Watches, the watch's 46.2mm case frames a complex dial with date, day, month and four-digit year indications , along with an ultra-precise moon phase display that shows the moon seen from both the northern and southern hemispheres and will deviate from the natural lunar cycle by just one day after 577.5 years. IWC also managed to mount a power reserve indicator on the dial (which shares the 3 o'clock with the 31-day date display), informing the wearer of the status of the watch's impressive 7-day running autonomy.
Like the Timezoner, the Perpetual Calendar's Ceratanium case has a tinted sapphire crystal on the back, this one offers a view of another in-house movement, IWC's automatic Caliber 52615. In addition to the famous Pellaton winding system, robust ceramic components and long week-long power reserve replica watches stored in two barrels, the movement has a hacking seconds function that enables precise reset in coordination with a time signal. Clocking at 28,800 vph and featuring 54 jewels and the signature IWC medallion on its openwork rotor, the movement is protected inside the 60-meter water-resistant case by a large screw-down crown characteristic of historic pilot watches. The Ceratanium bracelet attaches to the wrist with a folding clasp. Limited to 150 pieces, the Big Pilot's Watch Perpetual Calendar Ceratanium is priced at $48,000.