Ultra‑chron

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 1914, 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 and sapphire
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: 49.00 mm
Thickness: 13.90 mm
Water Resistance: Water-resistant to 30 bar
Case Specificities: Screw-in crown, Unidirectional rotating bezel
Weight: 172.1 g

Dial & Hands
Dial color: Black
Hour markers: Applied indexes
Hands: Silvered 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: Stainless steel
Buckle: With triple safety folding clasp and push-piece opening mechanism

General
Magnetic resistant: Yes
Chronometer Officially Certified: Yes

Reference
L2.836.4.52.6