Longines Ultra-Chron L2.537.4.72.6

Longines Ultra-Chron Classic

Model: L2.537.4.72.6 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. General: Water resistant 5 Bar, 5-Year Warranty, Mens Dial: Sunray silver, Hour markers, Applied indexes Case: Round, Stainless Steel, 37 mm, 19 mm lug width Bracelet/Strap: Stainless Steel w ith double security folding clasp with micro adjustment system Crystal: Scratch-resistant sapphire crystal, with several layers of anti-reflective coating on both sides Movement: Swiss Automatic, L836 Caliber Self winding mechanical movement beating at 36'000 vibrations per hour, with a monocrystalline silicon balance-spring power reserve up to 52 hours Product new with original box and manufacturer’s warranty * Free Shipping on all purchases Share