IWC marks its 150th anniversary with a Jubilee collection of 27 original watches that join its flagship lines. They include three Pilot's Watches, one of which is this Big Date – the first IWC Big Pilot's Watch with a date display. Two discs, one for units and one for tens, put the date clearly in view at 12 o'Clock. Meanwhile, the power-reserve indicator relocates to the back so as to preserve the uncluttered dial of a pilot's watch. For this, IWC added a circular window to the soft-iron cage without compromising magnetic resistance.