Tap the image to enlarge
Oris ProPilot X Calibre 400 39mm Titanium 01 400 7778 7153-07 7 20 01TLC
Ref. 01 400 7778 7153-07 7
Sits in Oris’s upper tier here — more premium than three quarters of the Oris watches we list, which start at £1,350.
Price range £1,350 to £5,350 across 64 Oris watches in stock.The ProPilot X is Oris doing something unusual for an aviation watch: stripping it back rather than adding to it. Where the genre typically reaches for size and complexity, this 39mm titanium version is explicitly a downsizing of the mechanical pilot's watch tradition — a considered reduction that makes it far more wearable across daily life without softening the industrial character the line is built around. The fluted bezel echoes aircraft turbine engineering, and the media-blasted grey dial reads more like a cockpit instrument than a dressed piece. At 11.8mm thick, it wears flatter than you might expect from a watch carrying this much movement, and at 98.4 grams the titanium bracelet and case together feel almost absent on the wrist — the integrated angular links are a genuine fit with the case, not an afterthought. The Calibre 400 is the real point of differentiation within Oris's own range: twin barrels for a 120-hour reserve, anti-magnetic resistance well beyond what most wearers will ever need, and accuracy held to COSC tolerances. It is the movement Oris built to prove the in-house argument. The LIFT clasp — a direct reference to aviation seatbelt mechanisms — is not decorative engineering. Links adjust on screw pins rather than friction pipes, which means size changes are repeatable and reliable rather than a one-time compromise.
- Reference
- 01 400 7778 7153-07 7
- Brand
- Oris
- Collection
- ProPilot
- Case size
- 39mm
- Case thickness
- 11.8mm
- Lug width
- 20mm
- Case material
- Titanium
- Case shape
- Round
- Dial
- Grey
- Crystal
- Sapphire
- Movement
- Automatic
- Calibre
- Oris 400
- Functions
- Date
- Water resistance
- 100m
- Bracelet / strap
- Titanium bracelet
- Strap colour
- Grey
- Clasp
- Folding clasp
- Lume
- Super-LumiNova
- Condition
- Pre-owned
- Retailer
- Goldsmiths
Additional specifications
- Lug-to-lug
- 47mm
- Power reserve
- 120 hours
- Origin
- Swiss made
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 Automatic Watches (1,425), Grey Dial Watches (240), Pre-Owned, Ex-Display & Vintage Watches (211) and Titanium Watches (153).
2-year Goldsmiths warranty
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
Compare 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 7153-07 7 | L38024532 | 2790-ST-52051 |
|---|---|---|---|
| Price | £2,750 | £2,900 | £2,595 |
| Case size | 39mm | 39mm | 40mm |
| Water resistance | 100m | 100m | 100m |
| Movement | Automatic | Automatic | Automatic |
| Strap | Titanium bracelet | Leather strap | Stainless steel bracelet |
| Power reserve | 120 hours | 72 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 100m it is rated for swimming and snorkelling, though not for diving.
Will the glass scratch?
Unlikely. Sapphire is second only to diamond in hardness and shrugs off everyday marking.
Does it need a battery?
No. It is automatic — the motion of your wrist winds it, and there is no cell to replace.
How 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?
20mm. 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.
Will it fit my wrist?
Lug-to-lug is 47mm, which suits wrists from roughly 16cm (6¼ inches) upward.
Lug-to-lug decides fit more than case diameter does.
Is it a men's or women's watch?
Listed as unisex, and at this size it suits any wrist that takes the dimensions.
Cheapest place to buy
Goldsmiths at £2,750, pre-owned. No UK retailer we track lists this reference new.
Is this available new?
Not from the UK retailers we track. This reference is listed as pre-owned only, at £2,750 from Goldsmiths. Goldsmiths test every pre-owned watch for authenticity, timekeeping and water resistance, and warrant it for 2 years — the same term they give on a new watch.
Who are Goldsmiths?
Goldsmiths has been selling watches in Britain since 1778 and is part of the Watches of Switzerland Group, which is listed on the London Stock Exchange. They are an authorised dealer, so a watch comes with the manufacturer’s own warranty.
You may also like
In stock, and close on style and price
