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Oris Aquis Calibre 400 43.5mm Green Strap Mens Watch
Ref. 01 400 7790 4157-07 4 23 47EB
Sits in Oris’s upper tier here — more premium than three quarters of the Oris watches we list, which start at £1,400.
Price range £1,400 to £5,350 across 50 Oris watches in stock.A 43.5mm stainless steel dive watch with a gradient green dial and a unidirectional rotating bezel carrying a green ceramic insert marked with a diving minutes scale and a luminous starting marker. The domed sapphire crystal has an anti-reflective coating on the inside, and a sapphire caseback offers a view of the movement. Applied indices and hands carry Super-LumiNova, with the date window sitting at six o'clock. The in-house Calibre 400 runs at 28,800vph from twin barrels, delivering a 120-hour power reserve and a stop-seconds mechanism for precise setting. The green rubber strap fastens with a deployant clasp and uses Oris's tool-free quick-change system. Lug width is 23mm; water resistance is rated to 300 metres.
- Reference
- 01 400 7790 4157-07 4 23 47EB
- Brand
- Oris
- Collection
- Aquis
- Case size
- 43.5mm
- Case thickness
- 13.10mm
- Lug width
- 23mm
- Case material
- Stainless steel
- Case shape
- Round
- Dial
- Green
- Crystal
- Sapphire
- Bezel
- Unidirectional rotating
- Movement
- Automatic
- Calibre
- 400
- Functions
- Date
- Water resistance
- 300m
- Bracelet / strap
- Rubber strap
- Strap colour
- Green
- Clasp
- Deployant clasp
- Lume
- Super-LumiNova
- Retailer
- Mappin & Webb
Additional specifications
- Power reserve
- 120 hours
- Warranty
- 2 years
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 6 collections
This watch appears in the Oris Aquis range (21), Stainless Steel Watches (2,706), Automatic Watches (1,549), Sports Watches (698), Dive Watches (491) and Green Dial Watches (378).
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
- One of Oris's more premium watches
Worth knowing
- 43.5mm sits at the larger end
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 4157-07 4 23 47EB | R32127162 | HBF002J1 |
|---|---|---|---|
| Price | £3,300 | £3,080 | £3,550 |
| Case size | 43.5mm | 43mm | 42.6mm |
| Water resistance | 300m | 300m | 300m |
| Movement | Automatic | Automatic | Automatic |
| Strap | Rubber strap | Ceramic bracelet | Stainless steel bracelet |
| Power reserve | 120 hours | 80 hours | 72 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
Mappin & Webb is the only UK retailer we track stocking this reference, so there is nothing to compare it against today.
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