IWC Schaffhausen Pilot's Watch Automatic 36. IWC's Pilot's Watches were developed over 80 years ago as rugged and reliable instruments for airborne celestial navigation. That also determined the distinctive instrument look that has characterized the watches design to this day. This version of the Pilot's Watch Automatic 36 was inspired by the iconic design of the Pilot's Watch Mark XVIII. The diameter of just 36mm not only makes the watch a perfect fit for a slightly slimmer wrist it also marks a return to the original size of the Mark 11 navigation watch, which was produced in Schaffhausen for the Royal Air Force (RAF) from 1948. The watch has a stainless-steel case, a black dial and rhodium-plated hands. The technical features include a soft iron inner case to protect the movement against magnetic fields and a front glass that was specially secured against sudden drops in pressure.