The Titanium Field Guide

Longines Ultra-Chron Carbon

L2.839.4.52.2

The Longines Ultra-Chron Carbon is a current-production diver watch with a carbon fibre composite case. At 80 g it sits among the lighter diver watches in the guide, and is priced well above the $1,299 median for the category.

All Longines watchesExotic-material diver watchesLightweightLightest, ranked
Price
$4,900
Material
Carbon
Grade / type
Carbon fibre composite
Weight
80 g (head only)
Water resistance
300 m
Reference
L2.839.4.52.2
Type
Diver
Case diameter
43.0 mm
Origin
Switzerland
Movement
High-frequency automatic (5Hz)
Caliber
L836.6
Power reserve
52 hours
Complications
Date
Colour
Black
Construction
Assembled
Finish technology
Natural finish
Caseback
Titanium
Nickel-free
Unconfirmed (clasp or buckle material not confirmed)
Bracelet / strap
Rubber strap; titanium crown and caseback
Crystal
Sapphire
Display back
No
Dial
Black cushion dial
Dial colours
Black
Lume
Super-LumiNova
Availability
Offered
Status
Current
Not published
Thickness, Lug-to-lug, Hardness, Surface treatment, Matching bracelet
Medium confidence Verified Jul 2026 Source: Longines (maker product page) / Longines Ultra-Chron (maker) / SJX
Facts are free to cite with a link.
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Frequently asked questions

What is the case material of the Longines Ultra-Chron Carbon?

The Longines Ultra-Chron Carbon has a carbon fibre composite case with a titanium caseback. It is recorded at medium confidence pending a maker-stated material.

What size is the Longines Ultra-Chron Carbon?

It is 43.0 mm in diameter, and water resistant to 300 m.

How much does the Longines Ultra-Chron Carbon weigh?

About 80 g (head).

How much does the Longines Ultra-Chron Carbon cost, and is it available?

It is current-production and lists from $4,900.

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