The Wristwatch 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 $1,195 median for the category.

Exotic-material diver watchesBlackDiversUnder $5,000
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
Caseback
Titanium
Nickel-free
Not verified (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 Ultra-Chron (maker) / SJX Maker / listing ↗
Facts are free to cite with a link.
See it in the interactive guide

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Alternatives to the Longines Ultra-Chron Carbon

Seiko Prospex Marinemaster Professional 600m Titanium (SBDX067)SeikoProspex Marinemaster Professional 600m Titanium (SBDX067)$4,60045.4 mmDiversame category · same style · shared complications · similar priceSeiko Prospex Marinemaster Professional 600m Titanium (SLA081, 60th Anniversary)SeikoProspex Marinemaster Professional 600m Titanium (SLA081, 60th Anniversary)$4,60045.4 mm16 mm thick174 gDiversame category · same style · shared complications · similar price
TAG HeuerAquaracer Professional 300 Date Titanium (green)$4,95043.0 mmDiversame category · same style · shared complications · similar priceBell & Ross BR 03-92 Diver Red BronzeBell & RossBR 03-92 Diver Red Bronze$5,00042.0 mmDiversame category · same style · shared complications · similar priceBell & Ross BR 03-92 Diver White BronzeBell & RossBR 03-92 Diver White Bronze$5,25042.0 mmDiversame category · same style · shared complications · similar price
ZRCGrands Fonds MN64 3000 Titanium$5,25041.5 mmDiversame category · same style · shared complications · similar price

More exotic-material watches from Longines

LonginesSpirit Zulu Time Titanium 39mm$3,50039.0 mm69 gPilot
LonginesSpirit Flyback Titanium 42mm$5,90042.0 mm17 mm thickPilot
LonginesSpirit Titanium 42mm$3,70042.0 mmPilot
LonginesSpirit Titanium 40mm$3,50040.0 mmPilot
LonginesAvigation BigEye Titanium 41mm$4,40041.0 mm14.5 mm thickPilot
LonginesPilot Majetek Pioneer Edition (Titanium)$5,65043.0 mm13.3 mm thick78.7 gPilot

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.

All exotic-material Longines watches · Exotic-material diver watches · All 1,792 watches

Learn: Which Material? · Lightest Materials · Most Scratch-Resistant · Materials and Skin