Sicura is one of those Swiss names that slipped quietly into watchmaking history, despite having the sort of back catalogue that collectors tend to rediscover with enthusiasm.
The new Hexa 400 brings it back with a clear idea of what made the brand interesting in the first place. Rather than chasing nostalgia for its own sake, it updates a distinctive 1960s dive-watch formula with proper modern hardware.
At a glance
- Sicura has returned with the Hexa 400, a modern dive watch inspired by its 1968 Diver 400.
- The watch pairs a 40mm hexagonal steel case with dual crowns, a ceramic dive bezel, an internal dual-time ring and 400 metres of water resistance.
- It uses a Sellita SW200 automatic movement and is priced at EUR 1,450 including VAT or USD 1,380 before VAT.
Sicura’s specialist streak returns
Founded in Grenchen in 1939, Sicura built much of its character during the 1960s and 1970s under Ernest Schneider.
The brand leaned into unconventional tool watches, producing compressor-style divers, jump-hour pieces, LED watches, solar-powered models and multi-function designs under the slogan “The Specialist for Specialities”.
Its story became closely tied to Breitling after Schneider acquired the aviation-watch maker in 1979, eventually using Sicura’s facilities for production.
By 1993, Montres Sicura AG had become Breitling AG, leaving the Sicura name dormant for decades.
The revived brand is now managed by the Netherlands-based D Group, which also has watch interests including Blanchet and Stewart Dowson, along with close industry ties to Squale.
For its return, Sicura has chosen one of its more convincing historical shapes rather than one of its eccentric period experiments.
A sharper take on the 1968 Diver 400
The Hexa 400 takes its visual cue from the 1968 Diver 400, most clearly through its angular hexagonal case and twin-crown arrangement.
At 40mm across, 14mm thick and 46mm lug-to-lug, the stainless steel case is sensibly sized on paper, though its broad bezel and integrated bracelet give it more presence than the numbers suggest.
The case is made from 316L stainless steel with brushed surfaces and polished chamfers, giving the shape a cleaner and more deliberate finish than its vintage predecessor.
A sapphire crystal brings anti-reflective and anti-fingerprint coatings, while screw-down crowns and a screw-down caseback help deliver 400 metres of water resistance.
The external bezel has also been brought firmly into modern dive-watch territory.
It is now a 120-click unidirectional bezel with a black ceramic insert and a fully lumed 60-minute scale in Super-LumiNova.
Dual crowns add more than vintage charm
The most useful inherited feature is the dual-crown layout.
The upper crown operates a bi-colour internal rotating ring that can be used to track a second time zone, with colour combinations including blue and yellow, black and yellow, or orange and white depending on the reference.
It’s a practical solution for travellers who want an extra time reference without adding the cost or complexity of a GMT movement.
The lower crown handles time setting, date adjustment and winding, reversing the crown roles used on the original Diver 400.
Dial choices include black, blue and orange, each with a matte finish and a cleaner layout than the late-1960s model.
Applied Super-LumiNova hour markers, an oversized 12 o’clock marker and broad faceted hands keep the emphasis on legibility.
Sellita power and bracelet practicality
Inside the Hexa 400 is the Sellita SW200, a familiar automatic movement used widely in Swiss tool watches.
It runs at 28,800 vibrations per hour, has 26 jewels and offers a 38-hour power reserve, with hours, minutes, central seconds, hacking seconds and a date at 3 o’clock.
The movement choice is pragmatic rather than romantic, which suits the watch.
More notable at this price is the bracelet, a solid three-link stainless steel design with a deployant clasp, double push-buttons, a safety lock and tool-free micro-adjustment.
That last detail matters on a dive watch, especially one with the sort of weight and wrist presence the Hexa 400 appears designed to deliver.
Details & Specifications
| Brand | Sicura |
|---|---|
| Model | Hexa 400 |
| Case size | 40mm diameter, 14mm thick, 46mm lug-to-lug |
| Case material | 316L stainless steel with brushed surfaces and polished chamfers |
| Bezel | 120-click unidirectional bezel with black ceramic insert and Super-LumiNova 60-minute scale |
| Crystal | Sapphire with anti-reflective and anti-fingerprint coating |
| Crowns | Screw-down upper crown for internal dual-time ring, screw-down lower crown for time, date and winding |
| Water resistance | 400 metres |
| Dial options | Black, blue or orange matte dial |
| Movement | Sellita SW200 automatic |
| Frequency | 28,800vph |
| Power reserve | 38 hours |
| Functions | Hours, minutes, central seconds, hacking seconds, date and internal dual-time ring |
| Bracelet | Stainless steel three-link bracelet with deployant clasp, safety lock, double push-button release and tool-free micro-adjustment |
| References | H400.SS.A.40ATM.01.SS, H400.SS.A.40ATM.02.SS, H400.SS.A.40ATM.03.SS |
| Price | EUR 1,450 including VAT, USD 1,380 before VAT |
The Hexa 400 is a confident re-entry for Sicura because it doesn’t try to revive every oddball chapter of the brand at once.
It focuses on one strong vintage idea, gives it the materials and usability expected today, and lands at a price that should make sense to collectors looking for a dive watch with a less familiar name on the dial.
