@surrey.timepieces: Breitling Navitimer B01 Chronograph 41mm (AB0139) A 41mm take on one of Breitling’s longest-running designs, originally introduced in 1952. It keeps the Navitimer’s signature slide rule bezel and aviation-focused layout, paired with the in-house B01 automatic chronograph movement with around a 70-hour power reserve. Balanced proportions, classic dial configuration, and a design that has remained largely unchanged for decades.