Tap the image to enlarge
Oris Aquis Calibre 400 43.5mm Blue Dial Mens Watch
Ref. 01 400 7790 4135-07 8 23 02PEB
See more premium optionsHide
Stepping up in Oris's range
The Aquis Calibre 400 is built around a 43.5mm multi-piece 316L stainless steel case with a unidirectional rotating bezel fitted with a blue ceramic minute-scale insert. The domed sapphire crystal is applied to both front and back, the caseback being a see-through display, and both surfaces carry an internal anti-reflective coating. Water resistance is rated to 300 metres. The blue dial carries highly luminous hands and indices, with Super-LumiNova ensuring legibility in low light. The in-house Calibre 400 runs at 28,800 vph with twin mainspring barrels delivering a 120-hour power reserve, and displays date and power reserve alongside central hours, minutes, and seconds. An integrated stainless steel link bracelet with a folding clasp completes the watch, the clasp incorporating Oris's quick-adjust slide system for easy sizing at the wrist.
- Reference
- 01 400 7790 4135-07 8 23 02PEB
- Brand
- Oris
- Collection
- Aquis
- Case size
- 43.5mm
- Lug width
- 23mm
- Case material
- Ceramic
- Case shape
- Round
- Dial
- Blue
- Crystal
- Sapphire
- Bezel
- Unidirectional rotating
- Movement
- Automatic
- Calibre
- 400
- Functions
- Date
- Water resistance
- 300m
- Bracelet / strap
- Stainless steel bracelet
- Strap colour
- Silver
- Clasp
- Folding clasp
- Lume
- Luminous
- Retailer
- Goldsmiths
Additional specifications
- Power reserve
- 120 hours
Learn more about Oris
Paul Cattin and Georges Christian took over an empty factory in Hölstein in 1904 and named the company after a nearby gorge. It stayed independent, and stayed in that valley, for its entire history.
Oris built its reputation on volume mechanical watches made properly. By the 1960s it was among the largest Swiss employers in the sector, producing hundreds of thousands of movements a year. Its most curious historical footnote is regulatory: Swiss law restricted the number of jewels a watch could contain under certain classifications, and Oris fought a decade-long legal battle to be permitted to fit lever escapements — winning in 1968.
The quartz crisis nearly ended it. The company was bought out of the ASUAG conglomerate in 1982 by two managers, Rolf Portmann and Ulrich Herzog, who took it back to mechanical watches exclusively at precisely the moment the rest of the industry was abandoning them.
That independence remains the point. Oris is one of the few Swiss houses of any scale with no group ownership, and it competes on value rather than prestige — dive watches, pilot's watches, and the Big Crown line descended from its 1938 pointer calendar. The house developed its own Calibre 400 family from 2020, offering five-day power reserves and ten-year service intervals at prices well below the norm for in-house movements.
- 1904
- Paul Cattin and Georges Christian found Oris in Hölstein.
- 1938
- The Big Crown pointer calendar is introduced.
- 1968
- Wins the legal fight to use lever escapements.
- 1982
- A management buyout returns the company to independence.
- 2020
- The in-house Calibre 400 launches.
Also in 7 collections
This watch appears in the Oris Aquis range (21), Automatic Watches (1,540), Blue Dial Watches (758), Sports Watches (700), Dive Watches (503), Watch Price Drops (255) and Ceramic Watches (95).
Best of 2 retailers
What the specifications mean
A mechanical watch built to be worn hard and got wet.
Strengths
- 300m water resistance, rated for actual diving
- Sapphire crystal, which resists scratching
- 120-hour reserve survives a weekend off the wrist
- Luminous hands and markers for low light
Worth knowing
- 43.5mm sits at the larger end
Price history
This watch is currently at its lowest recorded price. It reached £3,350 on 10 August. Prices are checked every day, and we record any changes.
Oris Aquis Calibre 400 alternatives
Watches from other brands at a similar price, style and size, so you can see what else your budget can buy.
| Specification | 01 400 7790 4135-07 8 23 02PEB | SLA079J1 | 821.10.101.10 |
|---|---|---|---|
| Price | £2,345 | £2,580 | £2,590 |
| Case size | 43.5mm | 42.6mm | 42.5mm |
| Water resistance | 300m | 300m | 300m |
| Movement | Automatic | Automatic | Automatic |
| Strap | Stainless steel bracelet | Stainless steel bracelet | Stainless steel bracelet |
| Power reserve | 120 hours | 50 hours | 38 hours |
| This watch | Closely matched | Closely matched |
Your new watch
Frequently asked questions, and things you should know about this watch
Can I swim with it?
Yes. At 300m it is rated for swimming, snorkelling and recreational diving.
Water resistance explainedWill the glass scratch?
Unlikely. Sapphire is second only to diamond in hardness and shrugs off everyday marking.
Sapphire, mineral and acrylic comparedDoes it need a battery?
No. It is automatic — the motion of your wrist winds it, and there is no cell to replace.
Quartz, automatic and solar comparedHow long does it run for when it's not worn?
About 120 hours fully wound — enough to sit off the wrist over a weekend and still be running.
What size strap does it take?
23mm. Any strap of that width will fit, and on most modern watches quick-release bars make the swap a two-minute job with no tools.
Is it a men's or women's watch?
Listed as men's.
Cheapest place to buy
Both Mappin & Webb and Goldsmiths list it at £2,345, so choose on delivery and warranty rather than price.
Has the price changed recently?
It's currently at its lowest recorded price since we began tracking it. It's ranged between £2,345 and £3,350, today it's £2,345.
More Oris watches like the Aquis Calibre 400
In stock, and close on style and price
