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
Dimension: Ø 40.00 mm
Lug distance: 21 mm
Lug-to-lug: 47.20 mm
Thickness: 10.95 mm
Water Resistance: Water-resistant to 5 bar
Weight: 68.0 g

Dial & Hands
Dial color: Sunray silver
Hour markers: Applied indexes
Hands: Silvered polished hands

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
Material: Alligator strap
Color: Black
Buckle: With buckle

General
Magnetic resistant: Yes
Chronometer Officially Certified: Yes

Reference
L2.937.4.72.2