Ad
Ad
Ad
Ad
Ad
Ad
Reading time 3 min.

Sponsored: Fortis Stratoliner S-41 Gravity Black

Mission-driven and built for the stratosphere, the new Fortis Stratoliner S-41 Gravity Black fuses space-tested engineering with stealth design, showcasing the brand’s first manufacture chronograph calibre, the Werk 17.
© Fortis

Mission-driven and built for the stratosphere, Fortis expands its space-tested Stratoliner collection with the new S-41 Gravity Black. A modern evolution of the brand’s pioneering tool-watch philosophy, the timepiece combines aerospace-grade durability with a stealth aesthetic, delivering an eye-catching, professional chronograph built for performance.

Purpose-Driven Case Construction

© Fortis

At the core of the Gravity Black is the Stratoliner S-41 architecture, featuring a 41mm case crafted from recycled stainless steel with a black DLC coating hardened to extreme durability. Measuring 51mm lug-to-lug and 15mm thick, the profile strikes a confident yet wearable balance. A smoked sapphire caseback and anti-reflective sapphire crystal protect the dial and movement, while the screw-down crown with a triple-gasket system and FKM performance gaskets allows for 200 meters of water resistance. Completing the look is the brand’s signature Orbit Bezel, also executed in recycled steel for added integrity and visual consistency.

A Dial Built for Exploration

© Fortis

The Gravity Black’s stardust-textured dial evokes the vastness of space, accented by black metallic hands and white chronograph counters for enhanced legibility. Blue-glowing Super-Luminova X1 markings— dubbed “space-travel markings” by Fortis— ensure clarity in any lighting conditions, while the space-blue chronograph seconds hand provides a subtle but striking contrast. The result is a dial that’s both functional and atmospheric, celebrating Fortis’s long-standing connection to stratospheric exploration.

The Space-Tested Werk 17

© Fortis

Powering the Stratoliner S-41 Gravity Black is the Fortis Werk 17, the brand’s first manufacture automatic column-wheel chronograph movement. Tested under real-world spaceflight conditions in collaboration with the Swedish Space Corporation, the calibre delivers chronometer-grade precision, a 60-hour power reserve, and day-date functionality. Its robust design and proven performance reaffirm Fortis’s mission to engineer watches capable of thriving in environments far beyond the ordinary, ensuring the watch’s mechanical utility matches its intriguing aesthetics. 

Availability and Pricing

© Fortis

The Fortis Stratoliner S-41 Gravity Black (Ref. F2340018) is available now through authorized Fortis retailers and online at fortis-swiss.com, priced at 4,950 USD.


To learn more, visit Fortis, here.

Fortis Chronographs

Latest Articles

Doxa Brings Grade 5 Titanium Back to the SUB 300 for Clive Cussler Edition - The 300-piece edition adds a layered titanium dial
Doxa marks Clive Cussler’s 95th birthday with the SUB 300 Ti5, pairing a Grade 5 titanium case with a new two-layer dial and COSC-certified movement.
3 minutes
Ming Brings Hand-Hammered Pewter to the 37.06 Royal Selangor - A Malaysian metalworking tradition gets its moment on the wrist
Independent Ming teams with Royal Selangor for the 37.06 Royal Selangor, pairing a hand-hammered pewter dial with a lightweight titanium case in an 88-piece limited edition.
3 minutes
Jul 30, 2026
Nomos Glashütte Brings a Fresh Shade of Green to the Tangente neomatik 38 Update - The patented ring-date display gets a rich new colorway
Nomos Glashütte adds a forest-green dial to the Tangente Neomatik 38 Update, pairing its patented ring-date display with the ultra-thin DUW 6101 caliber.
3 minutes
Jul 31, 2026

You might also be interested in

Red, White, & Blue: Watches Celebrating America’s 250th Anniversary - The Semiquincentennial, say that five times fast
From Swiss-made chronographs honoring the Semiquincentennial to American military-inspired field watches and a heritage-driven Benrus's limited edition and a tribute from Britain, these timepieces mark 250 years of American history through craftsmanship, symbolism, and patriotic design.
8 minutes
Introducing the KUBO, a New Small-Seconds Collection from KIWAME TOKYO ASAKUSA - Sponsored
The new KUBO collection from KIWAME TOKYO ASAKUSA pairs compact 37mm proportions with lacquer dials, a Miyota automatic movement and a recessed small-seconds display inspired by the Japanese idea of a hollow or recessed space.
5 minutes
Jun 18, 2026
Movado Celebrates 145 Years of Swiss Watchmaking with the Heritage Kingmatic and Alta Centurion - Sponsored
Founded in La Chaux-de-Fonds in 1881, Movado celebrates its 145th anniversary with two new releases: the revived Heritage Kingmatic and the contemporary Alta Centurion chronograph.
4 minutes
Jun 30, 2026
Ad
Ad
Ad
Ad
Ad