GRAVITY EQUAL FORCE ULTIMATE SAPPHIRE LIMITED EDITION OF 25
The Gravity Equal Force is the world’s first automatic watch with constant force transmission. The result is consistent power delivery to the balance which ensures that the watch always delivers flawlessly constant precision.
With its off-center grey-toned sapphire dial, the strikingly cool monochrome watch offers an extraordinary view of the exquisitely-finished manufacture movement.
As a demonstration of his commitment to the System 78 collection, co-founder and head-watchmaker Claude Greisler insisted on adding a stop-work declutch mechanism to an automatic winding movement for the very first time in horological history. The history of watchmaking has seen many solutions developed to address this problem, but none have ever been applied to a watch even remotely close in price to that of the Gravity Equal Force. In keeping with the mission of the System 78 collection to democratize access to haute horology timepieces, the extraordinary value proposition of this watch extends to the exceptional hand-finishing of its movement. The Gravity Equal Force fully embodies a core Armin Strom principle: to relentlessly innovate and thereby secure a new place in horological history with every timepiece that we develop, regardless of ultimate price point.
Building upon the classic stop-work mechanism architecture, Claude Greisler has developed an ingenious stop-work declutch system that operates inside the mainspring barrel to provide more consistent power delivery to the balance at every stage.
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The hardest way to make a watch. The best way to wear one.
Movement, Handcrafted to Perfection
At Armin Strom, watchmaking begins with transformation rather than assembly. Within the Swiss manufacture in Biel, raw metal is reimagined into precision components through a carefully controlled sequence of operations. Every stage is executed in-house, ensuring complete mastery over both technical precision and aesthetic integrity, where advanced engineering and traditional craftsmanship operate side by side in perfect balance.
Once formed, each component is elevated through meticulous hand-finishing, turning functional parts into expressions of mechanical artistry. Angles are beveled, surfaces polished, and details refined to haute horlogerie standards before each movement is assembled twice to guarantee absolute precision. This disciplined process reflects a singular philosophy: to create transparent mechanics where every element is not only functional, but intentionally revealed.
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ARMIN STROM
where scientific innovation meets artisanal mastery.
Armin Strom transform raw metal into mechanical poetry through a carefully orchestrated series of steps: design, milling, stamping, galvanising, hand-finishing, and final assembly.