AB0138241C1A1 Premium Chronograph Waterproof Sapphire Crystal Leather StrapProduct 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" was born. AOPA is (still) the world's largest pilot club, with nearly every