Armin Strom / Mirrored Force Resonance Ruby

Key Highlights

• Natural ruby dial, each stone uniquely cut and selected for depth of colour and inclusions.
• In-house manual-winding Calibre ARF21 with patented Resonance Clutch and twin balance wheels.
• 43 mm stainless steel case with fully visible resonance mechanics on the dial side.
• Extensive hand-finishing, including hand-polished bevels, black-polished screws and Geneva stripes.
• Ultra-exclusive limited edition of 5 pieces, priced at CHF 85’000.

Armin Strom’s Mirrored Force Resonance is one of contemporary watchmaking’s clearest demonstrations of mechanical science on the wrist. The Mirrored Force Resonance Ruby adds a natural ruby dial to this independent manufacture’s signature resonance calibre, creating a contrast between mineral texture and engineered symmetry.

Each dial is cut from genuine natural ruby, chosen for its saturated red tone and visible inclusions that reveal its geological origin. These natural variations are embraced rather than concealed, reinforcing the authenticity of the stone against the precise, open-worked resonance display beneath.

Developed with a local stone artisan, the ruby dial reflects Claude Greisler’s view that materials in haute horlogerie should carry meaning as well as beauty. Ruby has long been present inside movements as synthetic jewels to minimise friction; here, the natural stone steps onto the dial, its shifting red tones providing a warm counterpoint to the exposed mechanics.

The 43 mm stainless steel case, with sapphire crystal and caseback treated with anti-reflective coating, frames this dialogue between stone and steel. White printed Roman numerals on the off-centre ruby dial add a classical touch, while rhodium-plated polished hands focus on legibility. A dark grey Alcantara strap with white stitching and a stainless steel pin buckle completes the watch with a discreet, tactile finish.

Resonance, refined in-house

Inside the Mirrored Force Resonance Ruby is the manufacture Calibre ARF21, designed, developed and produced entirely in-house. This manual-winding movement centres on Armin Strom’s patented Resonance Clutch, which couples two independent regulating systems so that their twin balance wheels gradually fall into harmonic resonance for improved stability over time.

A pusher at 2 o’clock instantly resets both seconds counters, letting the wearer observe the resonance phenomenon as the indications realign and then settle back into synchrony. Operating at 3.5 Hz (25,200 vibrations per hour), the calibre provides a 48-hour power reserve and uses 39 jewels and 276 components across dimensions of 37.20 mm by 6.70 mm.

Hand-finishing and philosophy

The Mirrored Force Resonance Ruby showcases Armin Strom’s approach to finishing. Hand-polished bevels define the bridges, while black-polished screws, perlage, circular graining and Geneva stripes on the reverse create layered textures; each watch is assembled twice to secure performance and visual refinement.

Every visible surface, from the open-worked bridges to the ruby dial, is part of a single composition. This reflects the brand’s philosophy of transparent expression and artisanal precision, which has shaped Armin Strom since 1967 and its revitalisation under Claude Greisler and Serge Michel in 2009.

Why it matters

The Mirrored Force Resonance Ruby condenses Armin Strom’s identity into one focused reference: a resonance movement made visible on the dial, an authentic natural material with horological symbolism and finishing aligned with haute horlogerie expectations. For collectors, particularly in markets that value rarity and technical authorship, a five-piece run at CHF 85’000 places this watch firmly in connoisseur territory rather than a simple colour variation.

Armin Strom’s blend of Swiss-German watchmaking tradition, in-house development and open-worked design continues to appeal to enthusiasts who demand both intellectual content and visual distinction in their next independent acquisition.