The IWC Big Pilot's Watch Perpetual Calendar is powered by an automatic movement inside of a 46.2mm stainless steel case. The green dial is protected by sapphire crystal. Complications include a perpetual calendar with displays for the day, date, month, and year as well as a power reserve indicator. The EasX-CHANGE green rubber strap is secured by a deployant clasp. Water resistant to 60 meters.