ULTRA-CHRON CLASSIC

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.   CASE Shape: Round Material: Stainless steel Glass: Scratch-resistant sapphire crystal, with several layers of anti-reflective coating on both sides Case Back: Screw-down case back Dimension: Ø 37.00 mm Lug distance: 19 mm Thickness: 10.95 mm Water Resistance: Water-resistant to 5 bar Weight:  59.0  g   DIAL & HANDS Dial color: Sunray silver Hour markers: Applied indexes Hands: Silvered polished hands Specificities: Swiss Super-LumiNova® MOVEMENT & FUNCTIONS Movement Type: Automatic Functions: Hours, minutes, seconds and date Caliber: L836 Movement Description: Self winding mechanical movement beating at 36'000 vibrations per hour, with a monocrystalline silicon balance-spring power reserve up to 52 hours STRAP  Bracelet/Strap: Strap  Material: Alligator  Color: Black Buckle: With buckle REF: L25374722