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Doxa SUB 300 Carbon Seafoam: Limited edition automatic watch launches with sapphire crystal and carbon fiber build

The new Doxa Sub 300 Carbon Seafoam Limited edition (pictured) comes with two strap options out of the box. (Image source: Watches of Switzerland)
The new Doxa Sub 300 Carbon Seafoam Limited edition (pictured) comes with two strap options out of the box. (Image source: Watches of Switzerland)
Doxa's new SUB 300 Carbon Seafoam Limited Edition is the latest addition to the iconic diver collection. It features a forged carbon case and unique seafoam-green dial. Limited to 100 pieces, it’s exclusive to Watches of Switzerland.

Doxa has just unveiled the SUB 300 Carbon Seafoam Limited Edition - a brand-new update to its iconic dive watch series - this time in partnership with Watches of Switzerland and capped at a scarce 100 pieces worldwide. 

The SUB 300 series first made an appearance in 1967 as a tough, professional-grade diver watch. The original models were very popular for their use of the no-decompression limit table on the bezel and high underwater visibility. Plus, the SUB 300 was also instrumental in the adoption of the helium escape valve in dive watches. As the series kept evolving, Doxa began experimenting with advanced materials and modern design choices. The brand then moved to forged carbon, first introduced in the SUB 300 Carbon lineup.

For the new launch, the Carbon Seafoam Limited Edition comes with a carbon fiber case measuring 42.5mm across and 13.5mm thick, finished with a matte, patterned texture. The Seafoam dial gives the model a softer, contemporary presence. Buyers will get two straps out of the box: a black rubber for daily wear and a Seafoam NATO strap.

Other technical features include:

  • COSC-certified automatic Swiss movement with 38-hour power reserve
  • Unidirectional carbon bezel for dive-time measurement
  • 300m (30ATM) water resistance, sapphire crystal, and titanium inner case
  • Super-LumiNova markings for underwater readability

The Doxa SUB 300 Carbon Seafoam Limited Edition has a retail price of $3,990 and is available exclusively through Watches of Switzerland's showrooms in the UK and US, as well as their online platform.

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(Image source: Watches of Switzerland)
(Image source: Watches of Switzerland)
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> Expert Reviews and News on Laptops, Smartphones and Tech Innovations > News > News Archive > Newsarchive 2025 09 > Doxa SUB 300 Carbon Seafoam: Limited edition automatic watch launches with sapphire crystal and carbon fiber build
Anubhav Sharma, 2025-09-23 (Update: 2025-09-23)