Grand Seiko
Sport Spring Drive GMT
Grand Seiko's Sport Collection Spring Drive GMT watches use Cal. 9R66 to combine Spring Drive precision (±15 sec/month) with a 24-hour GMT hand for dual-time tracking. The 40.5-44mm steel cases with ceramic bezels and 200m water resistance make these the most robust Grand Seikos in regular production. Dial textures are inspired by Japanese nature - moss, alpine cliffs, mountain snow.