Oris ProPilot X Calibre 115
Starting from 8000 €The Oris ProPilot X Calibre 115 is a contemporary pilot's watch that departs from the traditional aviator format to celebrate modern aeronautical engineering. Its 44mm case, built from several titanium parts, houses a fully skeletonised manufacture hand-wound movement with a ten-day power reserve and a patented non-linear power reserve indicator. The open-worked grey dial reveals the elongated mainspring, the small seconds offset at 7:30 and the complete architecture of the calibre. Fitted on a titanium multi-link bracelet with a deployant clasp and water resistant to 100 metres, this showcase piece from the Hölstein manufacture is aimed at enthusiasts of independent Swiss mechanics and unapologetically technical design.
Oris ProPilot X Calibre 115 pilot's watch
Founded in Hölstein in 1904, Oris has spent more than a century cultivating a singular identity in Swiss watchmaking: that of an independent house, entirely devoted to mechanical watches, whose vision fits in a single sentence, to create beautiful mechanical watches that make people smile. The brand has built a solid reputation with its tool watch collections, from the Aquis diver to the Big Crown ProPilot aviation watches, heirs to the big-crown pilot's watches that made its name.
Launched in September 2019, the Big Crown ProPilot X Calibre 115 marks a deliberate break from that catalogue. Here, the X does not denote a pilot's watch in the functional sense: it signals a piece inspired by next-generation aeronautical engineering. The bezel borrows a motif reminiscent of modern jet engine fan blades, and the case abandons the logic of an ultra-legible black dial in favour of exposing the mechanics. The construction itself is a technical exercise: several titanium parts assembled directly around the movement, with no traditional case middle.
This watch fully plays the role of a showcase for the manufacture. It puts the Calibre 100 series in the spotlight, a family of in-house hand-wound movements with a ten-day power reserve and a patented power reserve indicator, designed to demonstrate Oris's ability to develop its own movement bases. The bracelet, almost integrated into the case, remains compatible with standard 22mm models, which leaves real freedom for everyday use.
Technical specifications Oris ProPilot X Calibre 115
- Brand: Oris
- Model: ProPilot X Calibre 115
- Reference: 01 115 7759 7153-Set7 22 01TLC
- Indicative price: €8,000
- Movement: Mechanical hand-wound, skeletonised, Oris manufacture
- Calibre: Oris Calibre 115
- Diameter: 44 mm
- Thickness: 12.5 mm
- Water resistance: 10 bar / 100 m
- Materials: Titanium case composed of several parts, screwed titanium caseback
- Crystal: Sapphire, domed on both sides, double-sided anti-reflective treatment; transparent sapphire caseback
- Dial: Grey, skeletonised
- Strap: Titanium multi-link bracelet, deployant clasp
- Warranty: 2 years (free extension to 5 years via MyOris)
- Box contents: Luxury wooden presentation box and official manual
The Oris ProPilot X Calibre 115 pilot's watch
The ProPilot X Calibre 115 holds a distinct place in the manufacture's catalogue. Its 44mm titanium case is not simply a generous size: it is built from several parts assembled around the movement, an engineering choice that explains both its visual presence and its lightness. With a thickness of 12.5mm and a lug width of 22mm, the watch remains more wearable than its measurements suggest, titanium noticeably reducing the perceived mass on the wrist. The sapphire crystal domed on both sides, with anti-reflective treatment on both faces, follows the geometry of the case and protects a fully open-worked grey dial. This window onto the mechanics is the model's central argument: time is read via central hands and hour markers set above the bridges, while the small seconds at 7:30 and the power reserve indicator at 3 o'clock structure the display. The 10 bar water resistance places the piece among robust everyday watches, able to handle rain and splashes without concern. The titanium multi-link bracelet, designed specifically for this case, extends the lines of the model and closes with a deployant clasp. The overall effect is an unapologetically technical character, far removed from the classic black-dialled pilot's watch with oversized Arabic numerals.
The Calibre 115, the centrepiece of this aviation watch
At the heart of the piece, the Calibre 115 belongs to the Calibre 100 series developed by the Hölstein manufacture. This hand-wound movement delivers a 240-hour power reserve, a full ten days, achieved thanks to an elongated mainspring visible in its barrel at 12 o'clock. It beats at 21,600 vibrations per hour, or 3Hz, a moderate frequency that directly serves its autonomy. Its 34mm diameter, fifteen lignes, fills the case and gives the skeletonised dial its full scale. The patented non-linear power reserve indicator is the signature of the family: the hand travels an increasing distance as the autonomy diminishes, making the information all the more precise as the moment to wind approaches. The movement was not hollowed out after the fact, it was designed from the outset as a skeleton, which explains the coherence of the bridge layout. A hacking seconds function and precision regulation complete the specification. The finishing, mostly galvanic, embraces an industrial rather than decorative look, in keeping with the model's aeronautical inspiration. The screwed titanium caseback, fitted with a transparent sapphire crystal, allows this architecture to be observed from the other side, and the ritual of winding, only once a week, fully contributes to the pleasure of use.
Oris ProPilot X Calibre 115 pilot's watch: ten days of autonomy
A showcase piece from the independent manufacture, the ProPilot X Calibre 115 combines a 44mm titanium case built from several parts, a skeletonised grey dial and an in-house hand-wound movement offering 240 hours of power reserve. The patented non-linear power reserve indicator, the small seconds at 7:30 and the hacking seconds complete the display. The domed anti-reflective sapphire crystal and the screwed titanium sapphire caseback put the mechanics on display. Water resistant to 100 metres and delivered on a titanium multi-link bracelet with a deployant clasp, it carries a two-year warranty, with a free extension to five years via MyOris.
Movement
The heart of this aviation watch is the Calibre 115, a manufacture movement that is hand-wound and was designed from the outset as a skeleton. Its 240-hour power reserve covers ten full days, thanks to an elongated mainspring housed in a barrel visible at 12 o'clock. It beats at 21,600 vibrations per hour, or 3Hz. The display combines central hands, small seconds at 7:30 and a patented non-linear power reserve indicator at 3 o'clock, complemented by hacking seconds and precision regulation.
Diameter and materials
The 44mm titanium case is made up of several parts assembled around the movement, a construction that explains its angular design as much as its lightness. The 12.5mm thickness and the 22mm lug width contain the actual bulk on the wrist. The sapphire crystal domed on both sides receives a double-sided anti-reflective treatment, while the screwed titanium caseback incorporates a sapphire window. The skeletonised grey dial reveals the calibre's architecture without masking any of its workings.
Water resistance
Water resistance reaches 10 bar, or 100 metres, a comfortable figure for everyday use: rain, hand washing and the occasional swim remain without consequence. This is not a diver's watch, however, and the open-worked dial, like the transparent sapphire caseback, serves as a reminder that this is above all a mechanical showcase. The screwed titanium caseback ensures the case is sealed. It is best to avoid water sports and have the gaskets checked during periodic servicing.
Accessories
The watch is delivered on a titanium multi-link bracelet designed specifically for this case and closed with a deployant clasp. Its 22mm width allows the fitting of any standard strap of that size; the brand notably offers a black leather strap in 22mm as an option. This compatibility makes it possible to shift the watch's look, from technical to more dressed up. The whole is presented in a luxury wooden box, along with the official manual.
Warranty
Oris covers the ProPilot X Calibre 115 with a two-year warranty. Registering the watch on a MyOris account allows this coverage to be extended free of charge to five years, a simple step worth taking right after purchase. The warranty covers manufacturing defects and does not cover normal wear or damage resulting from improper use. A manufacture movement of this kind also requires periodic maintenance carried out by an authorised workshop.
ProPilot X Calibre 115 The pros
and cons
- In-house skeletonised manufacture calibre
- Ten-day power reserve
- Patented power reserve indicator
- Titanium case and bracelet
- Domed sapphire crystal, anti-reflective treated
- Sapphire caseback open on the movement
- Warranty extendable to five years free
- Wooden box and manual included
- Imposing 44mm diameter
- Reduced legibility from skeletonised dial
- Demanding daily hand-winding
- Limited 100m water resistance
- Galvanic finishing without bevelling
- High price for titanium
- Degraded accuracy near end of reserve
- Very distinctive, not very versatile style
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Prices and technical specifications are subject to change. Content and photos are not contractual.
