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Doxa SUB 300 Carbon COSC

C823N

The Doxa SUB 300 Carbon COSC is a 42.5 mm carbon dive watch with a Sellita SW200 base automatic movement.

All Doxa watchesDiver watches
Price
$3,290
Material
Carbon
Grade / type
Forged carbon
Water resistance
300 m
Reference
C823N
Type
Diver
Case diameter
42.5 mm
Origin
Switzerland
Movement
Automatic, chronometer
Caliber
Sellita SW200 base (COSC)
Power reserve
38 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 inner chamber and screw-down caseback
Crystal
Sapphire
Display back
No
Dial
Professional (orange), Divingstar, Sea Emerald, Aquamarine, Whitepearl and other colourways
Dial colours
Blue Green Orange
Lume
Super-LumiNova
Availability
Offered
Status
Current
Not published
Thickness, Lug-to-lug, Weight, Hardness, Surface treatment, Matching bracelet
High confidence Verified Jul 2026 Source: Doxa SUB 300 Carbon (maker) / Monochrome
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Alternatives to the Doxa SUB 300 Carbon COSC

Nomadic Brú 750NomadicBrú 750$2,49542.0 mm13.5 mm thickDiversame category · same style · shared complications · similar price
STILMegara Limited Edition (Titanium)$2,79542.0 mm13.4 mm thickDiversame category · same style · shared complications · similar priceSinn T50SinnT50$3,00041.0 mm12.3 mm thick53 gDiversame category · same style · shared complications · similar priceMTM XtremeMTMXtreme$3,02545.0 mm15 mm thickDiversame category · same style · shared complications · similar priceSinn T1 (EZM 14)SinnT1 (EZM 14)$3,10045.0 mm12.5 mm thick71 gDiversame category · same style · shared complications · similar price
SinnT2 EZM 15 (Titanium)$3,12041.0 mm13.3 mm thick59 gDiversame category · same style · shared complications · similar price

More watches from Doxa

Doxa SUB 600T Pacific (titanium)DoxaSUB 600T Pacific (titanium)$1,99040.0 mmDiverDoxa SUB 300 Ti5DoxaSUB 300 Ti5$3,19042.5 mm13.4 mm thickDiverDoxa Army Watches of Switzerland EditionDoxaArmy Watches of Switzerland Edition$4,50042.5 mm11.95 mm thickDiverDoxa SUB 300 Beta SharkhunterDoxaSUB 300 Beta Sharkhunter$7,85042.5 mm11.95 mm thickDiver

Frequently asked questions

What is the case of the Doxa SUB 300 Carbon COSC made of?

The case is forged carbon. That is confirmed against the maker's specification. The caseback is titanium.

What size is the Doxa SUB 300 Carbon COSC?

The case is 42.5 mm across. It is water resistant to 300 m.

How much does the Doxa SUB 300 Carbon COSC cost, and is it available?

It is in production, at a list price of $3,290.

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