Longines is marking 90 years since the patent for its pioneering flyback chronograph was published, an invention that helped reshape aviation timekeeping and remains one of the brand’s most significant technical achievements.
Originally developed during the rapid rise of aviation in the 1930s, the Longines flyback chronograph simplified a critical task for pilots. Instead of requiring separate actions to stop, reset, and restart the chronograph, the mechanism allowed all three functions to be performed with a single press. The result was faster operation, reduced risk of error, and more efficient navigation at a time when aircraft were travelling farther and faster than ever before.
After filing for protection in 1935, Longines was granted a patent on June 16, 1936, securing 15 years of exclusivity for the innovation. That same year, the flyback found its most celebrated expression in the 13ZN calibre, a movement still regarded by collectors as one of the defining chronograph calibres of the twentieth century. Among those who relied on the flyback was renowned American aviator and Antarctic explorer Richard Byrd, who wore one during his third expedition to Antarctica in 1939 and 1940.
Ninety years later, the flyback remains central to Longines’ identity. The complication lives on through the Longines Spirit Flyback and Longines Spirit Pilot Flyback collections, powered by modern movements featuring column-wheel flyback chronograph mechanisms, silicon balance springs, COSC certification, and 68-hour power reserves.
More than a milestone anniversary, the occasion serves as a reminder of an invention whose original purpose remains remarkably relevant. Built for speed, precision, and ease of use, the flyback chronograph continues to embody the practical innovation that first put Longines at the forefront of aviation watchmaking.