Grand Seiko Heritage Collection Spring Drive 40mm Watch Transparent Caseback along with a custom-designed rotor

along with a custom-designed rotor

fortifying the watch's robustness and securing its inner mechanisms

screw-back case

a small second counter at 6 o'clock

The long minute and seconds hands extend all the way to the minute track

Grand Seiko Heritage Collection Spring Drive 40mm Watch Transparent Caseback along with a custom-designed rotorGrand Seiko Heritage Collection Watch with a stainless steel case and bracelet and a 40mm silken dial. Shinshu, the region where all Grand Seiko Spring Drive watches are created, was once a major center of silk production. This classic design has a dial whose silken sunray pattern pays tribute to this heritage. The fine grain of the pattern radiates outwards and catches the light at every angle. It has a soft texture, as if it were the finest silk,