Ref. ST22-RF.75

Mirrored Force Resonance First Edition

CHF 58'000

A micro-mechanical revolution, the Mirrored Force Resonance First Edition in steel with a black gold colored dial is the result of years of intensive research by Claude Greisler and the Armin Strom manufacture in incorporating the physical phenomenon of resonance in watchmaking for the ultimate chronometric stability. It works by means of the patented Resonance Clutch Spring, which directly connects the two hairsprings for the fastest and most regular resonant state ever witnessed in a wristwatch.

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Category: SKU: ST22-RF.75

A physical phenomenon that has intrigued the greatest watchmakers for centuries yet remains exceedingly rare, the principle of resonance allows for a more regular timekeeping rate by synchronizing two balance wheels that oscillate in opposite directions at the same time. The manufacture’s patented Resonance Clutch Spring is able to reach and remain in a state of resonance faster and for longer than any other resonance system in watchmaking, resulting in a consistent rate that’s more impervious to shocks and positional rate variances.

The Mirrored Force Resonance not only deftly demonstrates the ingeniously conceived and patented Resonance Clutch Spring in action, but allows the wearer to track its performance with twin-second indicators linked to the two resonant regulating organs, which can be synchronized using a flyback function activated by a pusher on the case. This interactive feat of functional micro-mechanical art elevates Armin Strom’s unique resonance technology above all others.


Watches incorporating the physical phenomenon are some of the rarest, with only a handful having been invented in the history of watchmaking. Yet none can match the performance of Armin Strom’s patented Resonance Clutch Spring, recognized as the quickest synchronizing and most reliable resonance watch mechanism ever made. It represents a total reimagining of the way resonance can be taken advantage of watchmaking and a truly groundbreaking technical innovation.


Two independent, symmetrically mirrored regulators
Two white gold bridges on the movements back side
Opaline dial in “black gold” color
10 years warranty

Stainless steel, Sapphire crystal and case back with anti-reflective coating
Diameter: 43.00mm
Height: 11.55mm
Lug-to-Lug: 49.60mm
Water-resistance: 3 ATM / 30 m

Off-center dial in black gold

Steel, manufactured by Armin Strom, decorated by hand

Delivered with a genuine dark blue alligator strap
Width lugs/buckle: 22/20 mm

Pin buckle in stainless steel , a folding clasp in stainless steel is available on option

Limited Edition
25 pieces


All Variations