Wear a smartwatch with your Grand Seiko

Grand Seiko produces some of the finest dials in watchmaking. The Shinshu forest textures, the Shizukuishi snowflake patterns - each reference is finished by hand to standards that require magnification to appreciate fully. The Spring Drive movement occupies a unique mechanical position: a mainspring regulated by a tri-synchro escapement, accurate to one second per day. Wearing Grand Seiko on one wrist is already a considered decision. Smartlet One adds data to that wrist without touching the case.