Geneva Watch Days 2026 · Launch Deep-Dive
TL;DR — Doxa SUB 300 Ti5
- Doxa’s legendary SUB 300 is now permanently available in Grade 5 titanium — five colourways, one price, no production ceiling
- At USD 3,190 / SGD ~4,300 it competes directly with the Oris Aquis Titanium while offering stronger archival design credentials
- The Sellita SW200-1 movement is COSC-certified as a chronometer — rare at this price point from an independent brand
- Not a limited run: you can order one today from any authorised Doxa retailer
- Verdict: The most usable dive watch out of GWD 2026 — and the one most buyers can realistically own
Why Grade 5 Titanium Changes the Doxa Conversation
Doxa has been making dive watches since 1967, when the original SUB 300 appeared with its unmistakable orange dial and became the tool watch of choice for scuba pioneer Hans Haas. For most of the brand’s modern history the SUB 300 came in stainless steel — robust, proven, and slightly heavier than you’d like after a long shore dive. At Geneva Watch Days 2026, Doxa changed that permanently.
The SUB 300 Ti5 — Ti for titanium, 5 for Grade 5, the aerospace alloy used in surgical implants and Formula 1 components — is now a permanent-collection entry, available in five colourways at a single retail price of EUR 2,990 / USD 3,190. This is not a limited run. You can walk into a Doxa retailer today and specify your dial colour, which makes the Ti5 one of the most practically significant announcements out of an event otherwise dominated by tourbillons, meteorite dials, and watches priced “upon request.”
The Watch: What Grade 5 Titanium Delivers
Grade 5 titanium (Ti-6Al-4V) is approximately 40% lighter than stainless steel at near-equivalent hardness. In watch terms, that weight saving is felt on the wrist, not just on a specification sheet. On the SUB 300 Ti5, the Grade 5 construction extends to every major component: case, crown, screw-in caseback, and bezel. Doxa has not cut corners by placing a titanium top ring on a steel base — a cost-saving shortcut common in the category — and the Grade 5 titanium pin buckle on the rubber Dive Flex strap continues that material consistency to the clasp.
The case measures 42.5 mm in diameter, 45.0 mm lug-to-lug, and 13.4 mm thick. Doxa’s signature cushion shape distributes the lug-to-lug length across most wrist sizes without the watch reading oversized in wear. The domed sapphire crystal carries an anti-reflective coating; the screw-down crown and screw-in caseback seal the watch to 300 metres / 30 ATM — serious depth for what is primarily a recreational dive watch. The unidirectional bezel carries Doxa’s dual depth-and-dive-time scale, a feature that traces directly to the 1967 original and distinguishes the SUB 300 from bezel designs that offer only elapsed-time markings.
Specifications
| Specification | Detail |
|---|---|
| Reference (Professional/Orange) | 823.50.351.21 |
| Case diameter | 42.5 mm |
| Lug-to-lug | 45.0 mm |
| Case thickness | 13.4 mm |
| Case material | Grade 5 titanium throughout |
| Crystal | Domed sapphire with AR coating |
| Movement | Sellita SW200-1, COSC-certified chronometer |
| Frequency | 28,800 vph (4 Hz) |
| Power reserve | ~38 hours |
| Water resistance | 300 m / 30 ATM |
| Strap | Textured rubber Dive Flex, Grade 5 Ti pin buckle |
| Lug width | 20 mm |
| Price (USD) | $3,190 |
| Price (EUR) | €2,990 |
| Price (SGD, indicative) | ~S$4,300 |
Movement: When COSC Certification Matters
Inside every SUB 300 Ti5 is the Sellita SW200-1, running at 28,800 vph with 38 hours of power reserve. The SW200-1 is not the most technically complex movement in the Swiss industry — the same week at GWD saw Girard-Perregaux debut a tourbillon micro-rotor at $100,000 — but it carries something that most sub-$4,000 movements do not: COSC certification as an Official Swiss Chronometer. Independent testing confirms the movement runs between -4 and +6 seconds per day across five positions and three temperatures.
At USD 3,190, this certification is uncommon. Most certified chronometers at this price point come from Omega’s co-axial platform or Tudor’s in-house MT family. For an independent brand sourcing movements externally, carrying the COSC certification signals confident quality control — and gives buyers a measurable, independently verified guarantee rather than a brand promise.
Five Colourways, One Decision
The Professional orange (ref. 823.50.351.21) is the correct first Doxa. It is the colourway Hans Haas wore, the dial that gave the Sub 300 its identity, and the one that earns instant recognition from anyone with watch knowledge. The Sharkhunter black (823.50.101.20) is the stealth option — a genuinely handsome all-black combination that sidesteps the “statement orange” conversation at the office.
Caribbean blue (823.50.201.32) occupies useful middle ground: unambiguously Doxa but more immediately wearable than the orange. Redcoral (823.50.161.22) is bold enough to read as a pool watch and distinctive enough that you are unlikely to see another on a nearby wrist. The Whitepearl (823.50.011.23) is the specialist’s choice — a fully Super-LumiNova-coated dial that glows luminously in darkness and divides opinion in daylight. All five retail at USD 3,190. Spend your decision time on colour, not price arithmetic.
Versus the Oris Aquis: The Comparison Every Buyer Will Make
If you arrived here through The Watchology’s Oris Aquis buying guide, you are already asking the right question. Oris and Doxa are the two pre-eminent Swiss independent dive watch brands — neither conglomerate-owned, both built on active diving heritage — and the SUB 300 Ti5 and the Oris Aquis Titanium now compete for essentially the same buyer at essentially the same price. Full-titanium Aquis variants retail from approximately USD 2,800 to USD 3,500 depending on complication and dial; the Doxa Ti5 at USD 3,190 lands in the centre of that range.
The Aquis leans contemporary: a slimmer profile, a date complication, and Oris’s water-activated rubber strap technology. The SUB 300 Ti5 leans archival: the cushion case unchanged in silhouette since 1967, the oversized orange-tipped minute hand, the dual depth-and-dive-time bezel scale. For buyers who also considered Oris’s own GWD 2026 announcement — the community-themed Social Club Edition II — note that the Social Club is a statement piece with a social purpose; the Ti5 is a tool.
Neither watch beats the other objectively. The Aquis is the better daily-rotation watch in a modern wardrobe; the SUB 300 Ti5 is the better watch for someone who values the founding history of Swiss dive watchmaking. If wearing a dive watch with a suit is part of your calculation, the Aquis’s cleaner contemporary lines give it a slight edge for tailored contexts; the Doxa is more legibly sporty.
Versus the Tudor Pelagos: The Step Up
The Tudor Pelagos sits one tier above the Ti5 at USD 4,150–4,950. In that price gap you gain Tudor’s in-house calibre, METAS Master Chronometer certification above COSC, and the refinement of a brand with significantly greater manufacturing scale. The Pelagos earns that premium, particularly if in-house movements matter to you.
If USD 3,190 is your ceiling, however, the Doxa Ti5’s COSC certification closes much of the spec gap that matters to everyday wear. And no Pelagos ships in Professional orange.
Verdict
Most headlines from Geneva Watch Days 2026 described watches for a global handful of collectors. The Doxa SUB 300 Ti5 is the exception: a tool dive watch in a permanent lineup, at a price a working professional can reach, in a material that makes a meaningful practical difference. Whether you are graduating from the under-$1,000 dive watch tier or shedding the weight of a steel sports watch you wear every day, the Ti5 is where that search ends. It is the most usable novelty out of GWD 2026 and the one most likely to be on wrists, not in safe drawers, two years from now.
Prices correct as of 5 October 2026.
The Doxa SUB 300 Ti5 is priced at USD 3,190 and EUR 2,990 regardless of colourway. In Singapore dollars that is approximately S$4,300 at October 2026 exchange rates.
It uses the Sellita SW200-1 automatic, COSC-certified as an Official Swiss Chronometer. The movement runs at 28,800 vph with a 38-hour power reserve.
Both are Swiss independent dive watches in the USD 2,800–3,500 range with full-titanium construction and 300 m depth ratings. The Doxa SUB 300 Ti5 emphasises archival heritage design; the Oris Aquis is more contemporary and includes a date complication. See our full Oris Aquis buying guide for a model-by-model breakdown.
No. The Ti5 collection is a permanent offering with no announced production ceiling, available in five colourways from authorised Doxa retailers and doxawatches.com.
The Professional orange (ref. 823.50.351.21) is the iconic choice that carries the watch’s founding identity. Sharkhunter black is the most office-versatile. Caribbean blue offers a classic compromise. Whitepearl is the collector’s pick for its fully-lumed dial; Redcoral for those who want maximum visual distinction.
Sources: Doxa SUB 300 Ti5 Professional — official product listing, doxawatches.com; Introducing: The New Doxa SUB 300 Ti5 In Titanium, Monochrome Watches (2 September 2026); Geneva Watch Days 2026, official programme, gva-watch-days.com.
