In 1968, Longines released the Ultra-Chron Diver, the first high-frequency diving watch. The brand, with its winged hourglass trademark, created its first high-frequency chronometer as early as 1914, which measured to a tenth of a second, and in 1959 it developed the first high-frequency wristwatch movement, the observatory chronometer. which set new records in the field of accuracy.

The new Longines Ultra-Chron is inspired by the aesthetic codes and professional diving performance of the original 1968 Ultra-Chron. Water-resistant to 200 meters, red central minute hand and high frequency diving first watch. As with all Ultra-Chron models, Longines guaranteed an accuracy of one minute per month, which means an error of only two seconds per day. The watch had a cushion-shaped case, a date and a rotating bezel that allowed divers to determine the time of a dive, while the hands and indicators on the dial and the triangle on the bezel were filled with tritium to glow in the dark.

The new Ultra-Chron from Longines is a perfect example of advanced mechanical know-how and at the same time a reliable tool for working on the seabed. Its 43mm cushion-shaped steel case features a unidirectional rotating bezel, screw-down crown and is water resistant to 300 meters.

The grained black dial with red minute hand has white minute markers all around, while the hour markers and hands are coated with Super-LumiNova®. The original Ultra-Chron logo is located at the bottom of the dial, as well as on the case back.

The heart of the Ultra-Chron is the L836.6 caliber, a high-frequency in-house movement that beats at 36,000 vibrations per hour (or 10 vibrations per second). High-frequency movements, introduced by Longines in 1914 with an accuracy of 1/10 of a second, and in 1916 (with an accuracy of 1/100 of a second), made it possible to increase the accuracy of timekeeping. Since 1959, Longines has been using high frequency movements to improve the accuracy of its watches. By reducing problematic vibrations or changing its position during movement, the high frequency mechanism is more stable.

The high precision of Longines Ultra-Chron watches is confirmed by their certification as a “super chronometer” by the independent testing laboratory TIMELAB in Geneva. This designation goes beyond the normal chronometer certification. During the 15-day ultrachronometer certification process, the entire head of the watch (case and movement) is tested, including a series of tests at three temperatures: 8°C, 23°C and 38°C, confirming that it meets the most stringent accuracy criteria ( ISO 3159:2009).

The Longines Ultra-Chron is available with either a brown leather strap or a multi-link steel bracelet, as well as a special case that also contains a black NATO-style strap with a red stripe, made from recycled materials.

Its price is 3,440 euros with a strap and 3,650 euros with a bracelet.

A taste of watch details in the next video…

Exclusive representative: Swatch Group Greece (tel.: 210-9565656)

More information about Longines here.