The annual calendar of the Big Pilot’s Watch Annual Calendar Spitfire shows the month, date and day in three separate windows arranged according to the American date format. The advance mechanism automatically takes the length of individual months into account and requires manual correction via the crown once a year at the end of February. The slate-coloured dial has two subdials at “3” and “9 o’clock” – one for the power-reserve display and one for the red small seconds hand. The in-house 52850 calibre has two barrels to provide the higher torque required to drive the three display discs of the annual calendar. In addition, when fully wound, the twin barrels supply enough energy for a full 7 days’ power reserve. The sapphire-glass back provides a view of the exquisite movement, the rotor and the various decorations on the plates and bridges.
Stainless steel case Diameter 46.2 mm Height 15.3 mm Screw in crown See-through sapphire glass back Water resistance 6 bar
52850 Calibre IWC-manufactured movement Automatic, self-winding 168 hours Power Reserve Frequency 28800.0 vph (4.0 hz) 326 Components 36 Jewels Côtes de Genève, perlage
Annual calendar with displays for the month, date and day 7 days power reserve Power reserve display Glass secured against displacement by drop in air pressure Sapphire glass, convex, antireflective coating on both sides Pellaton automatic winding Rotor with 18-carat gold medallion Small hacking seconds
Slate-coloured dial with luminescence
Brown calfskin strap by Santoni Strap width 22 mm