LONGINES ULTRA‑CHRON CARBON R48913153 a concave bezel and a

a concave bezel and a cabochon crown to create a smooth silhouette

the round dial is housed in a 33

This watch also features a date display

the model is driven by an exclusive Longines L888

screw down crown

LONGINES ULTRA‑CHRON CARBON R48913153 a concave bezel and aDescription ULTRACHRON In 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