The Longines Ultra-Chron features a 43 mm titanium and carbon case paired with an anthracite dial detailed with Swiss Super-LumiNova for optimal legibility.

Powered by a high-frequency self-winding mechanical movement beating at 36,000 vibrations per hour, it includes a monocrystalline silicon balance spring and delivers a power reserve of up to 52 hours.

Designed for durability, this chronometer-certified timepiece offers 30 bar water resistance, a screw-in crown, scratch-resistant sapphire crystal with anti-reflective coating, and a resilient nylon strap with a titanium buckle.

Key Features

Brand	Longines
Collection	Ultra-Chron
Model Number	L2.839.4.52.2
Case Size	43 mm
Case Material	Titanium and carbon
Dial Color	Anthracite
Crystal	Scratch-resistant sapphire crystal with multi-layer anti-reflective coating
Movement Type	Self-winding mechanical
Frequency	36,000 vph
Power Reserve	Up to 52 hours
Balance Spring	Monocrystalline silicon
Water Resistance	30 bar (300 m)
Crown	Screw-in
Luminescence	Swiss Super-LumiNova
Strap Material	Nylon
Buckle	Titanium buckle
Certification	Chronometer-certified

Highlights

High-frequency mechanical automatic movement operating at 36,000 vibrations per hour
Lightweight and durable 43 mm titanium and carbon case construction
Scratch-resistant sapphire crystal with dual-sided anti-reflective coating
Anthracite dial accented with Swiss Super-LumiNova for enhanced visibility
Impressive 30 bar water resistance with a secure screw-in crown
Monocrystalline silicon balance spring providing resistance to magnetic fields and up to 52 hours of power reserve

Frequently asked questions

What movement powers the Longines Ultra-Chron?

It is powered by a high-frequency self-winding mechanical movement beating at 36,000 vibrations per hour with a monocrystalline silicon balance spring.

What is the case diameter and material?

The case measures 43 mm in diameter and is crafted from titanium and carbon.

What is the power reserve of this watch?

The mechanical movement provides a power reserve of up to 52 hours.

What is the water resistance rating?

This watch has a water resistance rating of 30 bar.

What type of crystal is used on the dial?

It features a scratch-resistant sapphire crystal with several layers of anti-reflective coating on both sides.

What type of strap is included with the watch?

The watch comes with a nylon strap secured by a titanium buckle.

Longines Ultra-Chron Men's Automatic Watch L2.839.4.52.2