Breitling AB0138241G1P1 Chronograph Automatic Swiss Movement Stainless Steel 43mm Water ResistantProduct Description The iconic Breitling pilot's chronograph its journey. In 1952, Willy Breitling developed a wrist mounted chronograph with a rotating slide rule that allowed pilots to perform all necessary calculations for flight. Two years later, this design was announced as the official timepiece of the Aircraft Owners and Pilots Association (AOPA). Thus, the "Navitimer," or "Navigation Timer," was born. AOPA is (still) the world's largest pilot