Longines Ultra Chron Classic Automatic Watch. Silver Dial Stainless Steel BraceletIn 1968, LONGINES launched the Ultra Chron Diver, the first dive watch equipped with a high frequency movement. At the time, LONGINES had already established itself as a pioneer in high frequency technology. As early as 1910, the winged hourglass brand created the first high frequency timekeeping device capable of measuring 1 10th of a second. In 1959, LONGINES developed the first high beat movement for a wristwatch, an observatory chronometer that