For years, Formex has been associated with robust, technically minded watches focused on ergonomics, innovative materials and practical engineering. The Essence, Reef, and Stratos collections built the Biel-based independent brand’s reputation as a maker of high-value sports watches with distinctive technical solutions, including the patented Case Suspension System and advanced clasp mechanisms. With the new Aria Manufacture Chronometer, however, Formex enters entirely new territory. Not only is this the brand’s first watch with an integrated bracelet, but it is also its thinnest, most refined and most ambitious mechanical project to date.
Presented during a launch event in SoHo, New York, the Aria introduces the proprietary micro-rotor movement co-developed with fellow Swiss independent brand Horage. The new watch feels considerably more sophisticated than previous Formex models, both mechanically and aesthetically. It is also a move upwards in price, complexity and finishing, entering an already very competitive segment.
The Formex Aria’s Integrated Design
The Formex Aria is housed in a 40mm Grade 5 titanium case measuring only 6.9mm thick, including the sapphire crystal. Lightweight construction has always been important to Formex. Still, with this watch, the lightness is not to enhance utility and functionality, but to offer exceptional elegance and fluidity, not just visually. At just 78 grams, including the bracelet, the watch almost disappears on the wrist. The proportions are particularly impressive considering the automatic movement inside, and the short 45.45mm lug-to-lug distance makes the compact, sleek watch a very comfortable companion.
One look at it, and the Aria is clearly a departure from the sharper, more industrial aesthetic of earlier Formex collections. The case and bracelet feature soft, flowing lines, rounded surfaces, and subtle transitions between brushed and polished areas. Formex describes the watch as shaped by nature over time, and while the concept may sound a bit too poetic, it is surprisingly relevant once seen from different angles. Nothing appears aggressively geometric. The surfaces curve organically, and the bracelet integrates seamlessly into the case.
On the bracelet, every titanium link features a slight curvature, almost imperceptible to the eye but immediately noticeable on the wrist. The finishing is also more elaborate, with individually hand-brushed links and mirror-polished bevels running across the edges. The bracelet features Formex’s patented micro-adjustment clasp system, allowing 3mm of extension on each side without removing the watch.
The Dial
For this new series, Formex created a sculptural dial stamped from a single brass piece. Each applied rose-gold-plated index rises above concave sections that resemble man-made ponds, and the surface gently slopes between each applied index. The recessed small seconds display at 6 o’clock balances the layout with the rose gold-plated hands and markers contrasting beautifully against the matte surfaces. Three matte lacquered colours are offered at launch. Denso Blue is the most contemporary, with a matte navy tone that absorbs light. Selva Green is a warmer organic hue, while Ardesia Grey feels colder, more mineral.
The Proprietary Calibre by Horage
Powering the Aria is the new FX01 calibre, Formex’s first proprietary movement, developed together with Horage. While not a fully in-house manufacture calibre in the traditional sense, the movement is exclusive to Formex in its design, engineering and finishing. The base is Horage’s impressive K2 micro-rotor movement, originally conceived as a modern, modular ultra-thin movement accessible to independent brands.
At 2.9mm thick, the FX01 uses a tungsten micro-rotor integrated into the movement, operating at 25,200 vibrations/hour, and featuring a full-silicon regulating organ including hairspring, escape wheel, and pallet fork. Power reserve exceeds 72 hours. The movement also incorporates several technical solutions, including a backlash-free geartrain pinion system that eliminates play when setting the hands. Each calibre is individually tested and certified by COSC.
The sapphire caseback reveals a movement finished specifically for Formex, with black-gold galvanic treatment, vertically brushed bridges, laser-textured recesses and hand-finished bevels. The tungsten micro-rotor is engraved with the Formex logo.
Price and Availability
The Formex Aria Manufacture Chronometer launches as a 100-piece founders edition for 2026. Deliveries are scheduled for September 2026. The price is set at EUR 7,600, USD 7,900 or CHF 5,900, placing the Aria above most previous Formex models, yet as it also introduces a level of movement sophistication, finishing, and design the brand had never explored before, it seems justified.
For more, visit formexwatch.com.