Photo: Uncommon Artifact
A 500-metre dive watch specified by a working saturation diver, with a quartz movement chosen on purpose: the Diver One is the tool watch with its priorities showing.
Verdict
| What it is | Scurfa Diver One D1-500 — 40mm 316L stainless steel case, Swiss quartz, matt blue dial with date, photographed on the steel bracelet |
| Price | From £298 — maker's list for the current D1-500 line (Scurfa Watches) |
| Availability | Sold direct by Scurfa in small batches; variants sell out between runs |
| The angle | The specification was written by the job: a heliox escape valve the maker tested himself, on decompression from 154 metres. |
| Verdict | Nothing here is decorative. It is a dive computer's backup, built like one. |
The story
Scurfa is Paul Scurfa, a commercial saturation diver in the North Sea offshore industry, and the Diver One is the watch he designed for that work. The checklist is the job's: a 40mm steel case rated to 500 metres, a heliox escape valve for saturation diving, a domed sapphire crystal, drilled lugs, a 7mm screw-down crown running four gaskets, and Grade A BGW9 lume on the dial, hands and bezel so the watch reads in the dark at a glance. The movement is Swiss quartz — in the current production an ETA F06 calibre with thermo-compensation and an end-of-life indicator — chosen because a working diver's watch has to survive knocks, start instantly and never need winding with gloves on.
Photographed twice for the daily story series, both times on the steel bracelet rather than the maker's rubber strap: once in flat light, where the dial sits matt blue and the white sword hands do all the talking, and once in a car, where the same dial picks up a brushed sheen. The judgement worth recording is how little of the design is styling. Next to the heritage reissues that dominate the dive-watch market, the D1-500 is a current-production tool specified against a real decompression schedule — and it is priced like equipment, not memorabilia.
The matt blue dial in flat light. Photo: Uncommon Artifact
Specs
| Reference | Diver One D1-500 (blue dial) |
| Movement | Swiss quartz with date — ETA F06.402 with HeavyDrive and PreciDrive in current production (maker's spec); earlier D1-500 runs used Ronda calibres |
| Case | 316L stainless steel, 40.0mm diameter × 47.7mm long × 14.4mm thick, 20mm strap size |
| Crystal | Domed sapphire, blue anti-reflective coating on the underside |
| Bezel | 120-click unidirectional; ceramic insert with luminous markers in current production (maker's spec) |
| Lume | Grade A Super-LumiNova BGW9 — dial, hands and bezel (glows blue) |
| Crown | 7mm screw-down, four gaskets, D1 logo |
| Valve | Heliox escape valve, tested by the maker at depth |
| Water resistance | 500 metres |
| Weight | 100 g (maker's figure) |
What to check before buying
- Battery age and the EOL indicator. The quartz calibres signal a dying battery by skipping seconds. Ask when the battery was last changed; on a 500-metre watch, who changed it matters as much as when.
- Bezel action and insert. The bezel should run 120 firm clicks with no back-play. Current production uses a ceramic insert; earlier runs used aluminium — know which you are pricing.
- Gaskets and the heliox valve. The depth rating is a seals claim. Before any real diving, budget for a pressure test and gasket service.
- Bracelet and clasp. Photographed here on the steel bracelet: check the clasp closes positively and the link screws are undisturbed.
Price record
| Diver One D1-500 | From £298 — Scurfa Watches list for the current production line (checked Oct 2026); titanium variants listed at £318 |
Want one?
- In the shop: browse current stock — one-off pieces, and they turn over fast.
- Hunting one? Join the Want List — tell us the maker and the budget; pieces like this surface in our trawl most weeks.
- This one: the maker's specification for the blue D1-500 is at See it at Scurfa Watches — scurfawatches.com. Not our listing. See Disclosure.
Related picks
- Seiko 6309 Turtle — the Professional 150 dial
- Bulova Oceanographer on ShopGoodwill — a dual-day diver behind a "35 Jewels" listing title
- RZE UltraHex UTD-8000 — a digital watch built like a tool
Photographed for the daily wrist-shot story series — not our stock, and not a sales listing. Disclosure
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