This efficient movement drives multiple watchmaking complications. Apart from displays for the date, day and month, the perpetual calendar has a four-digit year display that takes into account all the leap years in the Gregorian calendar until the year 2100. All these displays can be easily adjusted with the crown and advance automatically. The moon phase display represents the position of the moon in the northern and southern hemispheres. The Big Pilots Watch Perpetual Calendar TOP GUN combines the classic instrument look with the sport-inspired design of the TOP GUN line. The ceramic case and titanium crown are further indications of IWC Schaffhausens innovative technology and a reminder that it discovered these materials for use in its products.