The Navitimer 1 B01 Chronograph is a timeless classic loved by aviators and aviation enthusiasts since 1952. It features a 43mm diameter stainless steel case, black dial with red central seconds hand, silver chronograph counters, and applied indexes. Available in steel, steel and gold, or 18kt red gold, with various dial colors. The bidirectional rotating slide rule bezel allows for precise and easy use of the famous circular rule for navigation. Key features include the in-house Breitling Calibre 01 movement, reliability, and performance.