Big Pilot Heritage Ref. IW501004 Chronograph sometimes referred to as the

sometimes referred to as the "Masterpiece

The left chronograph registers feature a textured silver pattern against the highly saturated base dial

powered by the Rolex Caliber 2236

and enduring appeal

Originally designed for the Datejust

Big Pilot Heritage Ref. IW501004 Chronograph sometimes referred to as theIt started in 1940 when IWC produced 1,000 military navigators watches. These oversized B Uhr watches had distinctive dials and pocket watch movements converted to central seconds to be used for military applications. In 2002, IWC introduced a new automatic movement and modified it to central seconds. The result was a contemporary take on the classic B Uhr watch, dubbed the "Grosse Fliegeruhr" or Big Pilot's Watch (model number 5002). This exceptional