It is six years since Armin Strom first introduced its Mirrored Force Resonance, a watch that improved accuracy by synchronizing two balance wheels oscillating in opposite directions at the same time.
Thanks to the Resonance Clutch Spring, a flexible suspension connecting two hairsprings with its balance wheels, Armin Strom’s Resonance watches are more resistant to shocks or vibrations than standard mechanical movements, the company claims.
Now the watchmaker has housed an openworked version of its hand wound manufacture Calibre ARF21 in a new, more slender, case measuring 11.55mm in height and 43mm in diameter.
The watch has a raised sapphire glass box allowing the movement to be seen from multiple angles.
“Most notably, the two balance bridges have been openworked for more visual harmony between the two synchronised balanced wheels and the off-centre dial,” Armin Strom describes.
A pusher at 2 o’clock allows the two running seconds indicators – which rotate in mirrored clockwise and counter-clockwise motions – to be reset to zero and visually track the state of resonance.
Other mechanical features have been updated in addition to the architecture and re- engineered movement, such as the ratchet wheels and pawls that now take their inspiration from those found in pocket watches and provide a smoother tactile experience when winding.
Claude Greisler, co-founder and master watchmaker at Armin Strom, says: “The openworked Resonance movement further highlights the ingenuity of our unique and patented system. Even more incredibly, we’ve made the new Mirrored Force Resonance slimmer, paying particular attention to the ergonomics and overall proportions of this exceptional timepiece.”
The new stainless steel Armin Strom Mirrored Force Resonance is limited to 25 numbered pieces.
It comes with a 10-year warranty and is retailing for £52,100 / $59,000.
