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Oris ProPilot X Calibre 400 39mm Mens Watch
Ref. 01 400 7778 7155-07 7 20 01TLC
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.The ProPilot X arrived in 2019 as the bolder, more angular expression of Oris's pilot lineage — skeletal, large, confrontational. Three years later at Watches & Wonders 2022, the 39mm Calibre 400 version reframed the proposition: the same jet-engine bezel geometry and multi-piece titanium case, but sized for daily wear and paired with what Oris had spent five years building — its first in-house automatic movement. That movement is worth dwelling on. The Calibre 400 runs a silicon escapement that makes it effectively anti-magnetic without a Faraday cage, holds five days of reserve, and is rated accurate to -3/+5 seconds per day, within COSC tolerances. Oris backs it with a ten-year service interval and a ten-year warranty on registration — a meaningful commitment for a manufacture movement at this stage of the brand's in-house development. The sapphire caseback lets you watch it run. At 39mm on a full titanium bracelet with integrated end links, the watch sits closer to a 40–41mm in presence but disappears on the wrist in terms of weight. The smoky blue dial is textured rather than plain, though at certain angles the printed indices read flatter than the case geometry around them suggests.
- Reference
- 01 400 7778 7155-07 7 20 01TLC
- Brand
- Oris
- Collection
- ProPilot
- Case size
- 39mm
- Case material
- Titanium
- Case shape
- Round
- Dial
- Salmon
- Crystal
- Sapphire
- Movement
- Automatic
- Calibre
- 400
- Functions
- Date, Power reserve indicator
- Water resistance
- 100m
- Bracelet / strap
- Titanium bracelet
- Strap colour
- Silver
- Clasp
- Folding clasp
- Lume
- Super-LumiNova
- Retailer
- Mappin & Webb
Additional specifications
- Lug-to-lug
- 46.9mm
- Power reserve
- 120 hours
- Warranty
- 10 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 4 collections
This watch appears in the Oris ProPilot range (7), Back in Stock (4,007), Automatic Watches (1,417) and Titanium Watches (135).
Best of 2 retailers
What the specifications mean
A mechanical watch for everyday wear.
Strengths
- 100m water resistance covers swimming and watersports
- 39mm suits most wrists
- Sapphire crystal, which resists scratching
- 120-hour reserve survives a weekend off the wrist
- Luminous hands and markers for low light
Oris ProPilot X 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 7778 7155-07 7 20 01TLC | L38035536 | 2766-ST-50001 |
|---|---|---|---|
| Price | £3,500 | £3,750 | £3,595 |
| Case size | 39mm | 39mm | 40mm |
| Water resistance | 100m | 100m | 100m |
| Movement | Automatic | Automatic | Automatic |
| Strap | Titanium bracelet | Stainless steel bracelet | Stainless steel bracelet |
| Power reserve | 120 hours | 72 hours | 56 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 100m it is rated for swimming and snorkelling, though not for 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.
Will it fit my wrist?
Lug-to-lug is 46.9mm, which suits wrists from roughly 16cm (6¼ inches) upward.
Lug-to-lug decides fit more than case diameter does.
How to size a watch to your wristIs it a men's or women's watch?
Listed as men's, though at 39mm it sits in the range that suits anyone.
Cheapest place to buy
Both Mappin & Webb and Goldsmiths list it at £3,500, so choose on delivery and warranty rather than price.
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