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 observatory chronometer that set new records in terms of accuracy. The new Ultra-Chron is inspired by the aesthetic codes and professional diving features of the 1968 model. These chronometer-certified watches are powered by an exclusive LONGINES calibre equipped with a silicon balance-spring and resistant to magnetic fields.

Self winding mechanical movement beating at 36'000 vibrations per hour, with a monocrystalline silicon balance-spring power reserve up to 52 hours.

Screw-in crown Unidirectional rotating bezel, Water-resistant to 30 bar, Scratch-resistant sapphire crystal, with several layers of anti-reflective coating on both sides.

Black dial, Swiss Super-LumiNova®.

Stainless steel bracelet, With triple safety folding clasp and push-piece opening mechanism.

Style#: L28364526