This Topper Edition is powered by Armin Strom's signature Gravity Equal Force calibre — the world’s first automatic watch innovation with constant force transmission. The result is consistent power delivery to the balance which ensures that the watch always delivers flawlessly constant precision.

A key innovation, exclusive to Armin Strom's System 78 collection watches, is the very first implementation of a “stop-work” de-clutch mechanism to be deployed in combination with an automatic movement. Typically seen only in haute-horology timepieces that are orders of magnitude more expensive, a “stop work” mechanism offers the benefit of more consistent energy transmission. To fully understand the benefit of this mechanism, one must first understand why an ordinary watch will not run at a consistent rate throughout the duration of its power reserve. The problem begins with the mainspring that inhabits every mechanical timepiece. A mainspring is a tightly coiled metal ribbon that resides inside of a watch’s barrel to deliver force to the movement. However, the force that a mainspring will deliver in an ordinary watch as it unwinds can never be delivered consistently, because the force provided will necessarily be higher when fully wound than it will be towards the end of its power reserve. To address this, Armin Strom implemented a “stop work” mechanism in the Gravity Equal Force that limits the mainspring from fully unwinding and thereby leverages only that part of the mainspring’s unwinding process which can deliver power most consistently.

This Topper Edition is individually numbered and limited to 15 pieces.