A limited edition of 271, this Pilot's Watch UTC Spitfire Edition "MJ271" in bronze is the first to incorporate UTC (Universal Time Coordinated) with an IWC-manufactured movement. An extremely useful function for a pilot, UTC makes setting a second time zone easy. Turning the crown (in mid-position) moves the hour hand in one-hour increments for local time; the date follows automatically. Home time is shown in the arched window at 12 o'Clock. The in-house Calibre IWC 82710 has a Pellaton winding system with ceramic components, for 60 hours of power reserve.