IWC Big Pilot, Stainless Steel 7 Day Black Dial 46MM Watch IW501001(PRE-OWNED)DESCRIPTION The IW501001 is a model that showcases the advancement of the Big Pilot collection from IWC with an in house caliber and a smoother visual facelift. The IW501001 has a stainless steel case that is 46. 2mm in diameter and 15. 5mm thick with a screw in crown, an anti reflective sapphire crystal and an inner iron case to protect against magnetic fields. The dial is black with white Arabic numeral hour markers, a power reserve indicator sub