In July, earlier this year, Doxa launched the SUB 300 Ti5 Clive Cussler, a 300-piece limited edition that reintroduced Grade 5 titanium to the SUB range. Now, they’re introducing a full SUB 300 Ti5 range as part of their core, non-limited collections. We got hands-on with them at Geneva Watch Days to learn more.
Starting with the case, the Grade 5 titanium construction is the big news here. The SUB 300 is a big watch measuring 42.5mm diameter x 13.4mm but now that it’s made from lightweight titanium, this might be the most comfortable Doxa I’ve ever worn. It still features a 300m water resistance rating living up to the ‘professional dive watch’ brief that has been Doxa’s bread and butter for decades.
One of the advantages of Grade 5 titanium compared to Grade 2 titanium (the other common grade used in watchmaking) is that it’s approximately three times stronger and more scratch resistant. That has obvious benefits for durability and resilience but a harder surface also has other benefits. Namely, it’s possible to apply multiple types of finishing that are extremely difficult to produce on Grade 2, such as polishing.
That’s why the SUB 300 Ti5’s curving case body is brushed but the outer ring of the bezel and its toothed grip is polished. That polish is really noticeable when viewing the watch in the metal but is a little less apparent in the press imagery. This is why in some of our live photography the silver outer ring of the bezel appears dark or almost black, which is caused by the reflection – a phenomenon that leads to really high sheen polishes being called ‘black polish’.
There are five dial options in the core collection: Orange Professional, Black Sharkhunter, Blue Caribbean, Red Coral, and Whitepearl. The Whitepearl edition, which stands out due to being the only full lume display in the series, and the Red Coral are presented on a choice of dial matching colour or black Dive Flex strap, bringing the total number of references to seven. Choosing a favourite colour is difficult because I love the history of orange dial Doxas but the Red Coral is a new colour introduced on a couple of models for 2026, making it new and exciting.
Turning the watch over reveals a solid caseback that protects the Sellita SW200-1 COSC chronometer movement housed inside. Being a chronometer means it has been tested for precision and reliability in multiple positions, giving you confidence in its timekeeping even deep underwater. The 38-hour power reserve is its weakest point by modern standards but it just means you’ll want to wear it everyday if you don’t want to constantly reset it.
The Whitepearl with its full lume dial is priced at £2,850 while the rest of the collection is £2,750. That’s a £200 – £300 increase over the SUB 300 in steel, which feels like an appropriate increase for a Grade 5 titanium upgrade. If you’re not a Doxa fan, I doubt this release will change your mind, but if you are a Doxa fan, there’s a lot to like about this updated range.
Price and Specs:
More details at Doxa.
