DANIEL ROTH Tourbillon Platinum

Greubel Forsey introduces the final and most exclusive editions of the Balancier Convexe S²: one in black ceramic with 5N red gold, and one in white ceramic, each strictly limited to 11 pieces.
These editions conclude a calibre developed through five years of mechanical and architectural exploration, with production set to cease permanently in 2026.

The Convexe case (41.5 mm) and movement were conceived as a single architectural whole, integrating Greubel Forsey’s signature 30° inclined balance wheel system as the visual and chronometric centre. The openworked movement features 301 components, including a 68‑part escapement platform, and is powered by two rapid-rotation coaxial barrels delivering a 72‑hour chronometric reserve.

Finishing remains uncompromising: frosted titanium bridges, polished bevels, hand‑finished countersinks, and meticulous transitions — even on invisible components.

Two Final Interpretations
Black Ceramic & 5N Red Gold
A dramatic contrast of dark architecture framed by ceramic, with red gold adding warmth and sculptural depth.The interplay of matte and polished surfaces enhances the piece’s three‑dimensional form

White Ceramic
A purist, graphic expression that highlights the structural geometry of the movement through light and shadow.The monochromatic case offers clarity, openness and a distinctly technical aesthetic.

Both editions preserve the characteristic S² display: suspended hours/minutes bridge, small seconds, and sector power‑reserve indication beneath a curved sapphire crystal.

This launch marks the concluding chapter of the Balancier Convexe S²’s five‑year evolution — not an iteration, but a final statement. As of 2026, Greubel Forsey will begin a gradual shift toward an almost entirely new collection, retiring earlier calibres with intention and ceremony rather than quiet discontinuation.
 

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Independent manufacture Greubel Forsey has unveiled the Balancier QM ($GF09cm$), marking a historic milestone for the workshop by officially naming its highest, most uncompromising hand-finishing standard: Qualité Musée (Museum Quality). While this meticulous level of execution has been quietly embedded into every single timepiece crafted by the Atelier since its founding in 2004, the Balancier QM is the first model to formally carry the designation. Driven forward by a dedicated research wing within the brand’s proprietary EWT (Experimental Watch Technology) Laboratory, this standard mandates that every individual component, whether fully visible through the sapphire crystals or buried deep within the gear train, must hold up as a standalone work of art.

The mechanical architecture of the Balancier QM is a tour de force of in-house micro-engineering and innovation. Most notably, the timepiece features a specialized hairspring manufactured entirely in-house from the raw alloy stage up—a rarity in modern watchmaking accomplished via restored antique machinery. This is paired with an impressive $12.60\text{ mm}$ variable-inertia balance wheel and a cutting-edge bi-level escapement system that utilizes unique convex pallet-jewels, allowing light to softly diffuse through the rubies rather than abruptly reflecting off flat surfaces. Illustrating the immense labor required for the Qualité Musée standard, the steel balance wheel bridge alone requires seven distinct hand-finishing techniques, ranging from flawless mirror barrel polishing to extra-large $0.40\text{ mm}$ hand-polished bevels.

Visually, the timepiece presents an intricately layered, three-dimensional landscape neatly organized within a highly compact 39.60mm white gold case. The movement architecture encourages deep visual exploration; the escapement is nestled into the lowermost depths of the chassis, while the eye naturally ascends past a high-set small seconds sub-dial, flame-blued polished steel hands, and a raised chapter ring. Beneath this upper track, a power-reserve indicator slips mysteriously across a dedicated sector to track the watch's 72-hour chronometric power delivery, sustained by two fast-rotating, series-coupled mainspring barrels. True to Greubel Forsey’s signature underplayed luxury, the words "Qualité Musée" are entirely absent from the dial, hidden instead on a secret internal plate deep inside the movement.

Limited to just 33 exclusive timepieces worldwide, the Balancier QM represents a deliberate strategic pivot for Greubel Forsey toward smaller, more wearable case dimensions without sacrificing an ounce of technical complexity. The manufacture openly acknowledges that achieving this level of structural perfection across all 298 movement parts demands an extraordinary expenditure of time, which will intentionally reduce the company's overall production volume heading into 2027. Looking ahead, the Qualité Musée standard will serve as the foundation for a series of compact releases, including a highly anticipated movement under development at the EWT lab featuring a gear train crafted entirely from solid gold.
 

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We are thrilled to announce the launch of the Armin Strom Gravity Equal Force Ultimate Sapphire Blue, a masterpiece of Swiss horology that combines technical innovation with glacial elegance.

Design & Aesthetics

The watch features a 41 mm stainless steel case and an off-center transparent sapphire crystal dial with a subdial. The main plate, crafted by Kari Voutilainen, showcases a stunning glacial blue guilloché pattern. The color palette of silvery greys and soft blues is inspired by the serene beauty of Swiss glacial lakes. The watch is completed with a blue nubuck leather strap with ice blue stitching.

Movement & Mechanics

Powered by the proprietary Caliber ASB19, the Gravity Equal Force Ultimate Sapphire Blue is the world’s first automatic movement with a patented stop-work declutch mechanism and Geneva cross. This ensures consistent torque and precision across a 72-hour power reserve. The movement is visible through both the front and back sapphire crystals, and features hand-finished components with perlage, Geneva stripes, and circular graining.

Craftsmanship

Each watch is assembled twice to ensure reliability and refinement. Every component is hand-finished in Biel/Bienne, emphasizing traditional techniques and an open-worked design.

Brand Philosophy

Armin Strom celebrates Swiss horological tradition and innovation. Founded in 1967 and revitalized in 2009 by Claude Greisler and Serge Michel, the brand is known for exposing movement mechanics on the dial side. Their motto, “The Science of Movement,” reflects their dedication to precision and craftsmanship.

Limited Edition

The Gravity Equal Force Ultimate Sapphire Blue is limited to just 25 pieces per year, making it a truly exclusive timepiece.
 

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Armin Strom unveils its latest horological creation, the Dual Time GMT Resonance Manufacture Edition Blue, strictly limited to just 50 pieces worldwide. Drawing from classical watchmaking codes, this exceptional timepiece introduces a subtle retro-chic character through a deep blue PVD-coated mainplate and gear-train bridges. Positioned directly on the dial side, the vibrant blue execution elevates open-worked architecture to new heights, delivering a visually captivating contrast that redefines traditional hand-finishing.

The aesthetic composition centers around two finely grained white dials, each adorned with white azurage chapter rings that catch the light while revealing the rich blue mainplate underneath. Accentuating the design are blue PVD-coated applied indexes and facetted polished hands that echo the hue of the underlying movement. Each display is paired with a black-polished day/night disc depicting sun rays and a uniquely crater-textured crescent moon, while a matte dark blue alligator leather strap with white stitching seamlessly ties the entire color palette together.

At the heart of the timepiece beats the in-house manufacture Calibre ARF22, a manual-winding movement engineered to harness the physical phenomenon of resonance. Utilizing Armin Strom’s patented resonance clutch, two independent regulating systems oscillate in perfect synchronicity, delivering heightened chronometric precision and an enthralling three-dimensional kinetic display. Providing intuitive functionality for global travelers, the movement powers two completely independent time zone displays—each with its own hours, minutes, and day/night indication—operating at a frequency of 3.5 Hz (25,200 vph) with a 42-hour power reserve.

Housed in a compact stainless steel case measuring 39.00 mm in diameter and 9.05 mm in height, the watch offers refined ergonomics alongside a water resistance of 5 ATM. The double sapphire crystal construction reveals exquisite decorative detail on both sides, including laser-engraved relief lettering on the reverse mainplate, bright polished bevels along the blue bridges, and rhodium-colored barrel bridges adorned with classic Côtes de Genève.
 

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Chronoswiss has officially introduced the Pulse GMT Frosted Guilloche Gold, a striking new expression of modern travel time created in its Atelier Lucerne. Housed in a beautifully sculpted 41mm 18ct (5N) gold case, this timepiece seamlessly brings precious materials into the bold, architectural world of the Pulse design family. Redefining the brand’s classic codes with a sharper, sportier attitude, the watch features Chronoswiss’s iconic onion crown, a partially knurled coin-edge bezel, and an exclusive new integrated black rubber strap. This exclusive, modern masterpiece is strictly limited to just 50 pieces worldwide.

At the heart of this timepiece is an innovative, three-dimensional dial that showcases a revolutionary take on a traditional decorative art. For the first time, a hand-guilloché brass surface is refined using a highly precise sandblasting process that directs ultra-fine synthetic corundum particles onto the dial. The result is a shimmering, frosted finish that transforms the geometric guilloché pattern into a crystalline landscape of light and depth. This contemporary backdrop is beautifully contrasted by polished, blue PVD-coated appliques, blued steel screws, and polished, blued steel hands in the brand's signature "Pyramid" shape.

Powering the watch is the Chronoswiss Manufacture Caliber C.6002, an automatic movement developed in partnership with La Joux-Perret that offers a 55-hour power reserve. Designed specifically for global travelers, the movement features a dedicated dual-time-zone module; home time is tracked on a 12-hour disc at 3 o'clock, a second time zone is displayed via a 24-hour GMT disc at 9 o'clock, and central hands sweep the dial to indicate minutes and seconds. The exquisite inner workings of the caliber are visible through a sapphire crystal case back, revealing a skeletonized tungsten rotor, polished escape wheels, and a ruthenium-plated bridge finished with a classic Geneva cut.

The solid 26-piece gold case, weighing 48 grams, balances satin-finished and sandblasted textures with a partly polished bezel, offering 5 bar (50 meters) of water resistance. Secured to the wrist by a black integrated rubber strap and a matching black DLC-coated stainless steel and 5N gold buckle, the watch represents the ultimate expression of the brand’s "Modern Mechanical" philosophy. By contrasting traditional luxury with high-functioning, contemporary materials, the Pulse GMT Frosted Guilloche Gold is engineered as a sophisticated mechanical companion for an ever-moving world.

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