IWC Big Pilot’s "Die Grosse Fliegeruhr" Stainless Steel, Black Arabic Dial with Power Reserve Indicator, 7-Day Power Reserve, Self-Winding Automatic Movement. Sapphire convex crystal with antireflective coating on both sides secured against displacement by a drop in air pressure. Fitted on a Brown Leather Strap with Stainless Steel Deployant Buckle. 

The 46.2mm diameter solid two-body case, downturned lugs, small angled bezel and large crown are polished/brushed. The dial is black with luminous lozenge hands, luminous Arabic numeral hour markers and baton indexes, a center sweep second hand, and an outer minute/second track. There is a date aperture window at 6 o’clock, and a 168 hours Power Reserve indicator with a red alert warning at the 3 o’clock position. It’s water resistant to 60 meters/200 feet, and the 15.5mm thick case, dial, and movement are all signed.

This IWC Big Pilot ("Die Grosse Fliegeruhr, Automatic") IW501001 has a mechanical automatic self-winding IWC caliber 52110 movement, with a Pellaton winding system. It’s rhodium-plated, with oeil-de-perdrix embellishment, and a shock absorber mechanism. It’s constructed with 257 Components and 31 jewels, a straight-line lever escapement, and a Glucydur beryllium alloy balance with a high-precision adjustment cam on the balance arms. It includes a self-compensating Breguet balance spring, and a hacking seconds mechanism. It has a Soft-iron inner case for protection against magnetic fields. The in-house automatic 52110 calibre employs ceramic and zirconium oxide to make the self-winding action resilient to wear, while the indexless balance and Breguet spring together refine precision.

Reference No. IW501001