A majestic white birch forest in the height of winter inspires a fully engraved Spring Drive masterpiece Today, Grand Seiko introduces a new manual-winding Spring Drive masterpiece from the Micro Artist Studio featuring a fully engraved case. Made one by ...
The intent in designing this version of the Spring Drive was to get maximum stability of timekeeping, and maximum run time (autonomy). Thus it has multiple spring barrels and when fully wound they produce quite a bit of torque (contain a lot of energy). U...