Unveiled at the Salon International de la Haute Horlogerie (SIHH) 2019 in Geneva as a part of new Spitfire line in the Pilot’s Watches collection, the IWC Big Pilot’s Watch Perpetual Calendar Spitfire Reference IW503601 is limited to 250 watches. This model features bronze case, olive green dial, gold-plated hands and brown calf leather strap.
The 52615 IWC-manufactured calibre has a power reserve of seven days. The heavy-duty components of the Pellaton winding are made from wear-resistant ceramic. The perpetual calendar identifies different month lengths and leap years automatically and will work until 2100 without needing any correction.
Since all displays are perfectly synchronised, the watch can be easily adjusted via the crown. The double moon display shows the moon in the correct position in the northern and southern hemisphere and takes 577.5 years to require adjustment by one day. The see-through sapphire glass back allows the user to view the highly embellished IWC-manufactured calibre.
Technical details
Model: IWC Big Pilot’s Watch Perpetual Calendar Spitfire Reference IW503601
Functions
Power reserve display
Perpetual calendar with displays for the date, day, month, year in four digits and perpetual moon phase for both northern and southern hemispheres
Small hacking seconds
Movement
IWC-manufactured calibre 52615
Mechanical movement
Pellaton automatic winding
Frequency: 28,800 vph / 4 Hz
Jewels: 54
Power reserve: 7 days (168 h)
Winding: Automatic
Case, dial and straps
Bronze case, titanium case back
Diameter: 46.2 mm
Height: 15.3 mm
Crystal: Sapphire, arched edge, anti-reflective coating on both sides
See-through sapphire glass back
Screw-in crown
Glass secured against displacement by drops in air pressure
Water-resistance: 6 bar
Olive green dial and gold-plated hands
Brown calf leather strap
Edition
Limited to 250 watches
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