Armin Strom
ST24-GEF.BLU Gravity Equal Force Ultimate Sapphire Blue

Armin Strom Gravity Equal Force Ultimate Sapphire Blue

WITH THE GRAVITY EQUAL FORCE ULTIMATE SAPPHIRE BLUE, WE BRING THE BEST OF SWITZERLAND TO YOUR WRIST: TIMEKEEPING, PRECISION AND BREATHTAKING LANDSCAPES

A new interpretation of Armin Strom’s signature timepiece, the Gravity Equal Force Ultimate Sapphire Blue, joins the System 78 collection with a cooler, glacial-toned aesthetic. This new edition highlights the transparency and depth of the collection’s distinctive architecture while introducing a refined palette of silvery greys and soft blue tones, evoking the tranquil clarity of Switzerland’s glacial lakes and alpine light.

A STUDY OF LANDSCAPE AND ARCHITECTURE

Housed in a 41 mm stainless steel case, the Gravity Equal Force Ultimate Sapphire Blue retains the defining features of the model, reimagined through a new chromatic lens. At its centre lies a richly textured, glacial blue guilloché main plate crafted by independent watchmaker Kari Voutilainen. The open dial—positioned asymmetrically on the left side—is made of transparent sapphire, revealing the silvery components below. The cooler colour palette continues throughout the movement, with the micro-rotor, equal- force barrel and finger bridges hand finished in rhodium to match the gear-train. These tones contrast cleanly with the transparent sapphire dial, while the blue nubuck leather strap ties the whole look together with a modern, streamlined finish.

CONTROLLING TORQUE WITH DELIVERY ON TIME

The watch is powered by Armin Strom’s proprietary Caliber ASB19, the first automatic movement to feature a stop-work declutch mechanism combined with a Geneva cross within the barrel. This patented system ensures that the force delivered to the balance remains constant throughout the 72-hour power reserve, greatly improving isochronism. The movement’s compact micro-rotor allows it to be wound efficiently

while preserving a thin and elegant profile. Visible through the front and back sapphire crystals, the movement showcases a thoughtful integration of engineering and aesthetics—delivering consistent precision in a visually open design.

A COMMITMENT TO HAND-FINISHING

Every component of the ASB19 is hand-finished in Armin Strom’s manufacture in Biel. The bridges are bevelled and polished by hand; screws are black polished. Traditional decoration techniques—such as perlage, Geneva stripes and circular graining—are applied with care, underscoring the brand’s belief that hand-finishing is integral to its identity. As with all Armin Strom creations, the Gravity Equal Force Ultimate Sapphire Blue is assembled twice. This dual-build process ensures both technical reliability and aesthetic refinement, reinforcing the brand’s uncompromising standards of craftsmanship.

LIMITED ANNUAL PRODUCTION

The Gravity Equal Force Ultimate Sapphire Blue is produced in a limited annual series of 25 pieces and is priced at CHF 27’500. It is part of Armin Strom’s System 78 Collection, a line dedicated to showcasing independent watchmaking through technical innovation, architectural design, and a commitment to traditional hand-finishing. The collection pays tribute to the birth year of co-founders Claude Greisler and Serge Michel, and to the values that continue to define the brand today.