Shopping Cart

Armin strom sets the tone in the realm of transparent mechanics with the Gravity Equal Force Ultimate Sapphire Purple

MAY 06 2024    |    Novelties

Armin Strom fuses masterful mechanics with a bold chromatic twist, unveiling its latest Ultimate Sapphire Edition. The iconic Gravity Equal Force now sports a striking purple guilloché-engraved mainplate by Kari Voutilainen. 

Armin Strom’s System 78 collection represents the independent manufacture’s purest expression of innovative haute horlogerie. Within it, the classical codes of watchmaking are revisited to bring about new functions and solutions, while also expressing the brand’s unique aesthetic sensibilities. With an emphasis on transparency, as well as highlighting kinetic elements, the Gravity Equal Force stands out as a technical tour-de-force with an instantly recognisable look – outstanding in form and function, finished by meticulous hand decoration. Now, with the new ‘Purple’ Ultimate Sapphire Edition, Armin Strom is doubling down on integrating vibrant chromatic hues with exceptional mechanics.

Let it reign: Gravity Equal Force Purple

At once regal and electric, the latest edition of the Gravity Equal Force features a colour Armin Strom has never used before. Its base plate boasts a guilloché engraved motif with a barley grain pattern, expertly handcrafted in the atelier of acclaimed independent watchmaker Kari Voutilainen using a traditional rose engine lathe. The striking purple colour is applied using a 3D PVD process, which reflects a wide spectrum of tones as it shifts with the light. Making this edition even more outstanding, the small off-centred dial is crafted from transparent sapphire crystal, which is reserved exclusively for the Gravity Equal Force’s Ultimate Sapphire Editions. The crowning glory is a light grey nubuck leather strap with purple stitching and keepers. The Gravity Equal Force Ultimate Sapphire Purple is limited to a run of 25 pieces per year.

 

Automatic: redefined

The Gravity Equal Force stands out as the first automatic watch endowed with an equal force transmission integrated directly in the mainspring barrel - a patented mechanism by Armin Strom. It provides consistent power transmission to the regulating organ, ensuring unwavering precision throughout the watch’s autonomy. The power reserve indicator forms part of the barrel, which is entirely visible from the dial side, opposite the micro-rotor with a unique click system featuring two springs for better winding efficiency.

Also this latest creation, part of Armin Strom’s perpetual quest for superior chronometric performance, was entirely developed, manufactured and decorated within the walls of the Bienne-based manufacturing site. Like all Armin Strom watches, the Gravity Equal Force Purple’s movement is assembled a first time to ensure it is in perfect working order and that it meets the brand’s exacting decorative standards, then taken apart and assembled a second time when it is ready to be cased in its final form. 

 

Putting the ‘haute’ in ‘horlogerie’

What separates a mere tool from a work of art is craftsmanship. Like a canvas for artistic expression, superlative hand-finishing applied by specialised watchmakers and seasoned artisans can be appreciated throughout the Gravity Equal Force and its many proudly exposed layers and components. Polished bevels (anglage) on the bridges, black polished screws, polished countersinks, perlage and various types of graining, be it straight or circular, as well as Geneva stripes on the three-quarter bridge visible through the case’s back.

One of the Gravity Equal Force’s most distinctive elements is the triplet of dark grey ruthenium-plated bridges that occupy the right-hand portion of the open display. Inspired by the finger-style bridges found in pocket watches, it takes up to an entire day for these bridges to be embellished by hand. First, the undersides are given a matt finish, after which the sides are given a straight-graining finish by carefully sliding them on an abrasive paper to produce continuous, shimmering fine lines. Then, the inner and outer chamfers of the bridges are bevelled with increasingly fine files and then finished with a flash polish using locally sourced gentian wood to remove even the finest lines. Finally, a straight-graining finish is applied to the top side for ultimate radiance.

Armin Strom : 15 years in the science of movement

In 2008, longtime friends and partners Serge Michel and Claude Greisler took the reins at Armin Strom and founded its very own manufacture in the watchmaking town of Biel in 2009. Just one year later, the duo presented their very first watch with a movement designed and manufactured in-house. Over the following years, Armin Strom would become a truly integrated and self-sufficient manufacture, creating 17 exclusive calibres and developing several world firsts in the domain of watchmaking. In 2016, it introduced the Mirrored Force Resonance, a game-changing resonating dual regulator developed for maximum chronometric precision with a captivating oscillation mechanism on the dial-side of the watch. In 2019, Armin Strom reinvented the automatic watch movement with the Gravity Equal Force, the first automatic watch to feature an equal force transmission mechanism within the barrel that had previously been found only in pocket watches. Today, Armin Strom stands out as a leading force of creative, independent watchmaking, with its own distinct design language and exceptional attention to detail highlighted by hand-finishing all its creations. 2024 promises to be a year full of surprises, and the best is yet to come…

 

Gravity Equal Force Ultimate Sapphire Purple

Technical specifications

                   

Indications     Hours, minutes, seconds, power reserve indicator
Movement     Armin Strom manufacture Caliber ASB19
      Automatic winding with micro rotor, Geneva-drive equal force barrel, offset display with subdial seconds
Main plate   purple PVD plate with guilloché pattern by Kari Voutilainen
Regulating system   Balance wheel with 4 regulating screws
Power reserve   Geneva stop-work limited to 72 hours
Dimensions   35.52 mm x 11.67 mm
Frequency   3,5 Hz (25,200 vph)
Finishing   Hand-finishing to the highest quality level
Jewels   28
Number of components   202
Case   stainless steel
    Sapphire crystal and case back with anti-reflective treatment
Diameter   41 mm
Height   12.65 mm
Water resistance   3ATM
Lug-to-Lug   48.09 mm
     

Dial

 

Grey toned off-center sapphire dial with subdial

Hands  

Faceted polished hands and Super-LumiNova® filling

Strap   Delivered with a grey nubuck leather strap with purple stitching and keepers
Width lugs/buckle   20/18 mm
Buckle   Pin buckle or folding clasp available in stainless
Reference   ST24-GEF.SA.AC.M.A7.FC
Limited production   25 pieces per year

 

 

                                           

                                            

 


Related Articles

JUNE 04 2026    |    Novelties

C BY ROMAIN GAUTHIER TITANIUM EDITION BRACELET LUMEN DIAL: LIGHT AS A CORE DESIGN MATERIAL

Independent manufacture Romain Gauthier illuminates its modern horological vision with the unveiling of the C by Romain Gauthier Titanium Edition Bracelet Lumen dial (Ref. MON00585). For the very first time, the brand integrates a full Super-Luminova dial into its celebrated Freedom collection, using light itself as a core design material. Deliberately paired with the C by Romain Gauthier Titanium Edition Bracelet—available for the first time in a limited edition of just 28 pieces—this creation redefines nocturnal legibility with ergonomic, everyday titanium luxury.

By day, the timepiece displays a refined, crisp white aesthetic anchored by sharp Grade 5 titanium numerals, indices, and hands. When darkness falls, the entire watch face transforms into a brilliant blue glow, creating a striking contrast that ensures effortless readability in any lighting condition. The integrated Grade 5 titanium bracelet—meticulously finished with alternating satin-brushed and hand-polished facets—flows seamlessly from the 41mm x 9.55mm case (47.8mm lug-to-lug), providing lightweight comfort and an uninterrupted, architectural silhouette.

Beneath the luminous dial lies an uncompromising expression of high-end Swiss watchmaking. Visible through the sapphire display back, the in-house hand-wound calibre crafted in natural Grade 5 titanium showcases Romain Gauthier’s heritage from the Vallée de Joux through modern "stepped" finger bridges. Each bridge is meticulously decorated with an exclusive hand-engraved dimpled texture, standing out against a hand-frosted movement mainplate while delivering a robust 60-hour power reserve.

Technical precision remains central to the manufacture's DNA, highlighted by the inclusion of a clever stop-seconds mechanism driven by a snail cam—a signature innovation inspired by the acclaimed Logical One. Pulling the off-center crown halts the balance wheel, while pushing it back in triggers the snail cam to deliver a subtle physical impulse, ensuring the movement restarts instantly. Strictly limited to 28 pieces worldwide, the C by Romain Gauthier Titanium Edition Bracelet Lumen dial represents an extraordinary convergence of glowing nighttime drama and superlative independent watchmaking.

 

View Watch Gallery
Image 1






  
View More
JUNE 05 2025    |    Novelties

Greubel Forsey Redefines Haute Horlogerie with the New GMT Balancier Convexe

Greubel Forsey unveils its new GMT Balancier Convexe. As the Earth takes centre stage within a newly reimagined amphitheatre, the hours, minutes, seconds, second time zone, and universal time indications become both companions and spectators to its quiet revolution.

The new GMT Balancier Convexe replaces its predecessor entirely – not as a variation, but as a complete reinterpretation. With a redesigned case, an integrated power reserve, and enhanced ergonomics, it becomes the purest expression of our GMT complication to date – and the only GMT model in our current collection.

A refined evolution
– Titanium Convexe case now more compact at 42.90 mm for improved wearability.
– New 72-hour power reserve indicator seamlessly integrated into the dial.

Technical enhancements
– 496 components, 73 more than its predecessor.
– Inclined escapement suspended beneath polished steel bridge.
– Real-time rotating globe in layered amphitheatre.
– Sapphire disc on caseback with 24 cities, La Chaux-de-Fonds replaces Paris.

Exclusivity
– Limited to 22 pieces worldwide.

View Watch Gallery
Image 1 Image 2
View More
AUGUST 03 2026    |    Novelties

CARVED BY TIME. CONNECTED BY HERITAGE. Chronoswiss Unveils the Small Second Stone Collection

Chronoswiss proudly unveils its latest masterpiece within the Modern Mechanical era, introducing the Small Second Stone Collection featuring stunning natural stone dials. The Small Second Jasper and Small Second Serpentine models pay tribute to the brand's remarkable journey, bridging its origins in Munich with its creative home in Lucerne. By uniting millions of years of geological history with over four decades of independent watchmaking, these timepieces transform nature itself into an exquisite canvas for mechanical artistry.

The narrative behind these watches stretches back millions of years before the creation of the first mechanical movement. The Small Second Serpentine features a striking green stone sourced from the region surrounding Zermatt and the Matterhorn, representing an ancient ocean floor pushed upward during continental collisions to form the Alps. Meanwhile, the Small Second Jasper utilizes the painted stone of the Earth from Germany, honoring the foundational roots of founder Gerd Rüdiger Lang and connecting with the historic stone-cutting traditions of Idar-Oberstein.

Because these creations rely on genuine natural minerals, every single dial is entirely unique. The Small Second Jasper captivates the eye with a landscape of warm beige, brown, and ivory tones housed in a refined stainless steel case, while the Small Second Serpentine presents a vivid green dial paired with a sophisticated two-tone stainless steel and 18-karat red gold case. Limited to just 50 pieces each worldwide, these wristwatches offer collectors an exclusive expression of organic beauty and sophisticated luxury.

At the heart of these models lies the Chronoswiss Manufacture Caliber C.6000, an automatic movement that delivers an approximate 55-hour power reserve. The movement features a skeletonized tungsten rotor and Geneva-striped bridges, which can be admired through the sapphire crystal case back. Housed within a 40-millimeter case featuring the signature fluted bezel and onion crown, the design maintains visual balance by placing the hand-guilloched small seconds subdial at the 9 o'clock position.

The Small Second Stone Collection stands as a pure and captivating expression of the Chronoswiss design philosophy. Marrying meticulous craftsmanship with exceptional horological engineering, these timepieces invite connoisseurs to wear a fragment of geological history on their wrists. Each watch successfully honors the past while pushing the boundaries of contemporary independent watchmaking into an exciting future.

 

View Watch Gallery
Image 1










  

 

View More
MARCH 25 2026    |    Novelties

SÄNTIS BY STREHLER - The world on your wrist

Three years ago, independent watchmaker Andreas Strehler launched his new brand, Strehler, to present his philosophy and craftsmanship in a more accessible form. The first model, Sirna, was designed as an essential time‑only watch that distilled his precision, expertise, and uncompromising finishing. The second model, Säntis, takes the brand naturally into the realm of complications. Like Sirna, which was named after the town Sirnach, Säntis draws its name from the mountain near Strehler’s workshop, the highest peak of the Appenzell Alps.

World Time Concept & Crown Operation
Responding to a collector’s request and inspired by his earlier Sauterelle Heure Mondiale, Strehler created a world time watch that remains elegant, intuitive, and deeply personal. Säntis uses a Cottier‑style world time display operated entirely by a single three‑position crown—preserving design purity and simplicity. The 40 mm medical‑grade stainless‑steel case blends refinement with ergonomics and stays below 10 mm thick even with the added mechanism.

Titanium Dial & Time Zone Display
The titanium dial features a sculptural three‑dimensional texture, individually machined, engraved, and hand‑polished. Its pattern is adapted from a design created with Eric Giroud for Sirna. Surrounding it, the 24‑hour ring marks day and night and rotates once per day, aligning with a fixed city ring listing 24 time zones. Central European Time is indicated by “Strehler” rather than a city, and DST‑observing cities are marked with a sun symbol. Both the city disc and 24‑hour disc use luminous printing, with additional luminous dots along the minute track.

Colour Options, Hands & Movement
The titanium dial features a sculptural three‑dimensional texture, individually machined, engraved, and hand‑polished. Its pattern is adapted from a design created with Eric Giroud for Sirna. Surrounding it, the 24‑hour ring marks day and night and rotates once per day, aligning with a fixed city ring listing 24 time zones. Central European Time is indicated by “Strehler” rather than a city, and DST‑observing cities are marked with a sun symbol. Both the city disc and 24‑hour disc use luminous printing, with additional luminous dots along the minute track.

Strap, Presentation & Limited Production
The Säntis comes with a subtly grained brown calfskin strap with contrasting off‑white stitching, and other colours are available upon request. Its steel pin buckle is crafted in‑house, echoing the case’s lines. The watch is delivered in a beechwood box with a cognac leather travel pouch. While not limited, production is naturally restricted due to the fully in‑house manufacturing of cases, dials, hands, and movements, resulting in only 30–50 watches per year shared between Sirna and Säntis.

View Watch Gallery  
  Image 1 Image 3  Image 4  Image 5    
View More
FEBRUARY 24 2026    |    Novelties

Chronoswiss Unveils the SPACE TIMER GRAVITY — A New Exploration of Mechanical Cosmos

Chronoswiss expands its avant‑garde Space Timer collection with the new SPACE TIMER GRAVITY, a 44mm mechanical creation inspired by the invisible yet powerful force of gravity. Limited to 50 pieces, the watch transforms cosmic phenomena into a visually architectural dial experience.

A Dial Where Light, Matter, and Mechanics Interact
The dial features a partly hand‑guilloché surface finished with a colour‑shifting CVD coating that transitions between deep green and oceanic blue depending on light — evoking the sensation of viewing a planet from orbit. A striking moon at 9 o’clock is produced through sophisticated laser work based on an original NASA photograph, revealing cratered textures with exceptional depth.

Floating above the landscape are transparent ITR2 hour and date rings that appear suspended in orbit. Beneath them, the exposed gear train is framed by a baby‑blue bridge, echoing the hue of the seconds hand and adding contemporary contrast to the cosmic scene.

A Case Built for Orbit
The 44mm matte‑grey stainless‑steel case delivers a modern, technical presence while allowing the dial’s dynamic surfaces to take centre stage. It pairs with a light grey nubuck leather strap for a refined, futuristic aesthetic.

The Engine Behind the Cosmos
Inside beats the Chronoswiss Caliber C.308, an automatic movement operating at 4 Hz with a 42‑hour power reserve. Mechanics remain proudly visible, emphasising the interplay between the unseen forces of gravity and the precise regulation of time.

A Limited Universe
Limited to 50 pieces worldwide, each SPACE TIMER GRAVITY captures the dance of light across its shifting dial, making every piece uniquely personal.

View Watch Gallery  
Image 1  Image 2  Image 3  Image 4
View More
ENDLESS DISCOVERY IN YOUR INBOX
Join our mailing list to receive insider updates on our latest collections, invites to private events, and other personalized offerings.