The Oris ProPilot X Skeleton brings the art of mechanical timekeeping into full view, offering a window into the intricate movement that drives it. Encased in lightweight titanium, this hand-wound watch eliminates the need for a battery and instead relies on the craftsmanship of its Calibre 115, a manufacture movement developed entirely in-house. The open dial and transparent case back reveal the gear train, barrel, and escapement working in harmony, making each glance an invitation to appreciate precision engineering. Designed for aviation enthusiasts and collectors alike, this model stands as a modern iteration of the tool watch, where transparency serves both aesthetics and function.
At 44.7 millimetres in diameter and 12.8 millimetres thick, the ProPilot X commands presence on the wrist without feeling cumbersome, thanks to the titanium construction. The skeletonised dial features a grey finish with large Arabic numerals and cathedral-style hands, ensuring legibility even when the inner mechanics steal the spotlight. A non-linear power reserve indicator sits at 3 o’clock, patented by Oris to show remaining energy in an intuitive way: the first few days deplete slower, mimicking the winding behaviour of a mainspring. This technical detail exemplifies the brand’s focus on usability over decoration.
The heart of this watch is the Calibre 115, a hand-wound movement that beats at 21,600 vibrations per hour (3 Hz) and stores an extraordinary ten days of power reserve. Achieving such a long duration from a single mainspring requires a large barrel and careful energy management. The movement is regulated to a daily rate of +6 to -4 seconds, a standard that rivals chronometer-certified pieces. The bridges and plates have been skeletonised and decorated with circular graining and perlage, visible through the sapphire case back. Each component is finished to a standard that rewards close inspection, yet the architecture remains robust enough for daily use.
Titanium is the material of choice for the ProPilot X, reducing overall weight while offering corrosion resistance and hypoallergenic properties. The case features the signature ProPilot bezel with a coin-edge profile, originally inspired by aircraft instruments. The crown, signed with the Oris logo, operates smoothly for winding and time setting. The integrated titanium bracelet provides a seamless look, secured by a folding clasp with a safety release. Despite its large diameter, the lug-to-lug measurement of 51.6 millimetres ensures the watch sits comfortably on a variety of wrist sizes, balancing visual boldness with wearability.
In terms of legibility, the skeleton dial does not compromise readability. The grey base allows the applied indices and hands to stand out, and the Super-LumiNova coating emits a strong blue glow in low light. The non-linear power reserve indicator uses a red needle against a white scale, making it easy to interpret at a glance. This combination of transparent mechanics and practical readability places the ProPilot X in a unique category: a genuine tool watch that also serves as a showcase of horological skill.
The ProPilot X Skeleton slots into Oris’s aviation collection but pushes the boundaries of what a pilot watch can be. Most pilot watches prioritise rugged simplicity; here, Oris introduces an element of spectacle without sacrificing utility. The in-house Calibre 115 represents a significant investment in manufacturing capability, and the skeletonisation highlights the brand’s willingness to expose its work to scrutiny. For collectors who value independent Swiss watchmaking, this model offers a compelling alternative to more expensive skeleton watches from larger houses.
One notable aspect of the ProPilot X is the way it handles the power reserve indication. Unlike linear indicators that show exact remaining hours, the non-linear system draws attention to the first few days after a full wind, encouraging the wearer to maintain a consistent winding habit. This design choice reflects a deep understanding of how users interact with hand-wound watches. It also aligns with the brand’s philosophy of developing solutions to real-world problems rather than simply following trends. Those interested in this approach can explore Oris’s collection of manufacture calibres, which demonstrates a consistent commitment to practical innovation from material selection to movement architecture.
When compared to other skeletonised watches in a similar price range, the ProPilot X stands out for its robust build and in-house movement. Many skeleton watches rely on modified generic calibres with added cut-outs, whereas Oris designed the Calibre 115 from the ground up with skeleton aesthetics in mind. This results in a more coherent visual identity: every cut-out serves a structural purpose, and the finished movement retains the integrity needed to withstand daily wear. The titanium case further differentiates it from common steel models, offering a modern, matte finish that resists scratches better than polished high-carbon stainless steel.
For those who appreciate the fusion of transparency and toughness, the Oris ProPilot X Skeleton delivers an experience that goes beyond telling time. It captures the essence of mechanical horology by making the invisible visible, while remaining a purposeful instrument designed for the demands of aviation. Whether worn in a cockpit or in everyday life, this watch invites its owner to engage with the mechanics that power it, turning each winding into a moment of connection with traditional watchmaking.
