Armin Strom Mirrored Force Resonance Manufacture Edition Blue Limited Edition ST22-RF.05 clearance Grand Seiko's inaugural mechanical chronograph

Grand Seiko's inaugural mechanical chronograph makes its long-awaited debut

7mm stainless-steel case has been Zaratsu polished at the hands of Grand Seiko’s artisans

Whether it's a morning swim in the bay or an evening at a gallery opening — the Ahoi makes a splash with its handsome color blocking and unabashed thirst for adventure

Rotating unidirectional bezel

Armin Strom Mirrored Force Resonance Manufacture Edition Blue Limited Edition ST22-RF.05 clearance Grand Seiko's inaugural mechanical chronographA milestone for independent watchmaking A micro mechanical revolution, the Mirrored Force Resonance in steel with a blue 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 and synchronizes the two hairsprings for