Armin Strom's Gravity Equal Force now available in a rose gold case

Armin Strom's Gravity Equal Force model now features an 18K rose gold case. This model features a unique constant-force barrel that attempts to eliminate the impact of torque fluctuations in the mainspring on accuracy. The openwork layout allows visitors to admire the hand-finished triple bridge and mainplate.

Learning from the past to discover the new, this ambitious work features a unique mechanism

　Armin Strom's Gravity Equal Force will be adding a model with an 18K rose gold case.

　The most distinctive feature of this model is the constant-force barrel, a clutch release mechanism installed in the mainspring barrel at 6 o'clock. To maintain stable watch accuracy, the escapement must operate with a constant force. However, there is a variation in the force applied when the mainspring is fully wound and when it is about to unwind. While this variation does not cause a fatal disruption to accuracy, the purpose of this system is to minimize its effect. Specifically, the clutch release mechanism stops the transmission of power before the mainspring is fully unwound, and conversely, when the mainspring is fully wound, it slips and stops winding. At first glance, this mechanism may seem to shorten the power reserve, but it actually ensures a full 72 hours. Inspired by antique pocket watches, the company developed this system and was the first in the world to successfully incorporate it into an automatic movement.

　The unique mechanism is not the only highlight of this model. The triple bridges, inspired by pocket watches, are hand-chamfered and polished, and the baseplate is decorated with perarouge and frosted finishes. The openwork layout, including the offset dial, exposed micro-rotor, and gear train, is also attractive. The in-house black dial, combined with the rose gold case and bridges, completes the overall look with elegance.