The Calibre 791 is a column wheel chronograph movement, as evidenced by its smooth pusher action, with a 4Hz beat rate and a 68-hour power reserve. It has a silicon balance spring (alongside numerous other anti-magnetic parts) and is COSC-certified with a central chronograph hand and two sub-dials: a running seconds and a 30-minute register. However, its most exclusive function is the "flyback." This allows the user to restart the timer while the chronograph is running and without first stopping and then resetting the chronograph hand. This allows for split second timing accuracy.
Off the Cuff: Longines Record Heritage Chronograph
For its part, the Record Heritage Chronograph is a deftly executed recreation with just the right mix of sport and class. And while it might look like a watch that has stepped out of the 1940s, its COSC-certified calibre will remind you that it’s also a chronometer for the modern age.
Off the Cuff: Longines Spirit Zulu Time GMT
Perhaps the most famous aviator watch ever designed by Longines was the Lindbergh Hour Angle, which the legendary pilot used to help him navigate by “dead reckoning” in his flight from New York to Paris. As 2022 marks the 190th anniversary of Longines, the Spirit Zulu Time is a nod to that pioneering past, but also a dead reckoning of its own—toward the future.