Breitling Watch Navitimer B01 Chronograph 41 RB0137241L1P1. Breitlings iconic pilots chronograph, for the journey. In 1952, Willy Breitling developed a wrist worn chronograph with a circular slide rule that would allow pilots to perform all necessary flight calculations. Two years later, the Aircraft Owners and Pilots Association (AOPA) announced the design as its official timepiece. The Navitimer was born.