When Two Hearts Beat as One: Armin Strom’s Zeitgeist 1665 Redefines Resonance

Armin Strom’s Mirrored Force Resonance Zeitgeist 1665 stands as both a tribute to scientific discovery and a triumph of modern watchmaking.

It reimagines a centuries-old concept, the phenomenon of resonance, and turns it into a wearable expression of balance, precision and beauty.

Named for the year Christiaan Huygens first observed synchronised oscillation, the Zeitgeist 1665 is less about nostalgia and more about refinement: the culmination of Armin Strom’s years of research into the physics of time.

In horology, resonance is the moment when two oscillating systems, in this case, balance wheels, influence each other until they fall into rhythm, improving accuracy and stability.

Historically, this was a fragile effect, easily disrupted by movement. Armin Strom’s engineers changed that with their patented resonance clutch spring, a mechanical linkage that keeps the twin balances in sync even during daily wear.

Verified by Switzerland’s CSEM institute, this mechanism transforms resonance from a theoretical curiosity into a practical tool for precision.

The brand frames the Zeitgeist 1665 as a thought experiment: what if reliable resonance had been mastered in Huygens’s day?

Navigation, exploration, and even humanity's understanding of time itself might have taken a different path. It is a poetic question, answered through meticulous engineering.

The Zeitgeist 1665’s beauty lies in its balance of technical complexity and visual calm. The 43-millimetre stainless steel case is slender at 11.55 millimetres, with flowing lugs and an anti-reflective sapphire crystal that frames the dial’s asymmetrical harmony.

The 18-carat white gold dial, finished in vernis laqué poli, displays twin running seconds that mirror the oscillations beneath; a visual dialogue between two mechanical hearts.

Its presence is confident yet discreet. The dark grey Alcantara strap, paired with a steel pin buckle, completes a composition that feels modern but timeless, perfectly suited to the kind of collector who values subtlety over showmanship.

At the heart of the Zeitgeist 1665 beats the Calibre ARF21_ZG, a hand-wound manufacture movement composed of 260 components and 39 jewels. It beats at 3.5 hertz and offers an 80-hour power reserve, ensuring steady performance.

The flyback seconds mechanism allows for precise re-synchronisation of the twin regulators, reinforcing the idea that this is not only a timepiece but a demonstration of mechanical communication.

Every surface of the calibre is hand-finished: bridges bevelled and polished, screws black-polished, plates adorned with perlage and Geneva stripes. It’s an aesthetic language that speaks quietly but authoritatively to the true connoisseur.

Limited to 25 pieces and priced at CHF 82,000, the Mirrored Force Resonance Zeitgeist 1665 is designed for collectors who view watchmaking as both an art and a philosophy.

It invites reflection on rhythm, balance and the elegant order hidden within chaos. More than a feat of engineering, it is a meditation on time; an instrument of thought as much as precision.

Armin Strom’s Zeitgeist 1665 whispers with conviction. It is the rare kind of watch that resonates long after you stop listening to it tick.