The dive watch world has been riding the mint green wave all summer, and Doxa — the brand that basically invented colorful dive watches — has finally decided to join the party. Their new Sub 300 Carbon Seafoam Limited Edition doesn’t just hop on the trend though. It marries that soft green hue with the rugged practicality of forged carbon fiber. The result feels both nostalgic and futuristic, which is exactly what you’d expect from a brand that’s been pushing boundaries since Jacques Cousteau was strapping their watches to his wrists in the 1960s.
A Heritage Worth Diving Into
Before we get into the technical details, it’s worth remembering that Doxa essentially wrote the playbook for professional dive watches back in 1967. The original Sub 300 introduced that iconic orange dial specifically because research showed it provided the best underwater visibility — a detail that saved actual lives. Fast forward to 1968, and Doxa collaborated with Rolex to create the first commercially available dive watch with a helium escape valve.
That legacy carries forward in every Sub 300, including this carbon variant that takes the classic 42.5mm case shape and transforms it into something that weighs significantly less on your wrist while maintaining all the diving capability.
Modern Materials, Timeless Form
Carbon fiber is not only lightweight but offers superior corrosion resistance compared to steel, which matters when you’re regularly exposing your watch to saltwater. The unidirectional bezel maintains the same material consistency, creating a cohesive aesthetic. Inside, you’ll find a COSC-certified ETA 2824 movement delivering 38 hours of power reserve.
The Seafoam Factor
This particular colorway is exclusive to Watches of Switzerland, and its quite a stunner. The sunray-finished dial catches light in a way that shifts from pale mint to deeper seafoam depending on the angle — a nice touch that adds visual depth without compromising legibility. Against the dark carbon case, the contrast works surprisingly well, offering something fresh in Doxa’s typically orange-heavy lineup.
The package includes both a black FKM rubber strap and a matching seafoam NATO, giving you options for different occasions. The rubber strap features a folding clasp with wetsuit extension, showing that Doxa will always remember who their core audience is.
Spec Sheet
Model: Sub 300 Carbon Seafoam Limited Edition
Case Size: 42.5mm
Case Thickness: 13.5mm
Case Material: Forged carbon fiber
Movement: ETA 2824 automatic
Water Resistance: 300m
Crystal: Sapphire
Straps: Black FKM rubber and seafoam NATO
Limited Edition: 100 pieces
Price: $3,990
Pricing & Availability
Limited to just 100 pieces exclusively through Watches of Switzerland, the Sub 300 Carbon Seafoam is priced at $3,990.
Recap
Doxa 300 Sub Carbon Seafoam Watches of Switzarland Limited Edition
Doxa just dropped a limited carbon fiber version of their iconic dive watch with a fresh seafoam green dial that’s exclusive to Watches of Switzerland.
