A conventional mainspring’s force drops as it unwinds. It’s a law as old as watchmaking itself. But laws were made to be understood, then transcended. The Gravity Equal Force reimagines the horological energy transfer through a constant-force mechanism that optimizes the non-linear power curve inherent in traditional mainspring systems. Put more simply: it breaks the laws of traditional watchmaking with radical micro-engineering.

Armin Strom’s ASB19 calibre features their patented equal force barrel combined with automatic winding. By implementing a sophisticated stop-work mechanism, we isolate the most consistent segment of the mainspring’s power curve, ensuring near-linear energy delivery to the escapement. In other words: we convinced the mainspring to deliver power as consistently as a Swiss train schedule. Driven by a micro-rotor, the movement maintains an impressively slim profile. The Gravity Equal Force proves that mechanical efficiency and visual intricacy work very well together. A point that we try to prove in every one of our timepieces, by the way.