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: Cushion
Material: Titanium and carbon
Glass: Scratch-resistant sapphire crystal, with several layers of anti-reflective coating on both sides
Case Back: Screw-down case back
Dimension: Ø 43.00 mm
Lug distance: 22 mm
Lug-to-lug: 48.90 mm
Thickness: 14.00 mm
Water Resistance: Water-resistant to 30 bar
Case Specificities: Screw-in crown
Weight: 67.0 g

Dial & Hands
Dial color: Anthracite
Hour markers: Applied indexes
Hands: PVD Grey polished hands
Specificities: Swiss Super-LumiNova®

Movement & Functions
Movement Type: Automatic
Functions: Hours, minutes, seconds
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
Material: Nylon strap
Color: Black
Buckle: With titanium buckle

General
Magnetic resistant: Yes
Chronometer Officially Certified: Yes

Reference
L2.839.4.52.2