Grand Seiko carries on doing innovate in its desire to make the best watches in the world on mechanical watches. This foundation ultimately led Grand Seiko to invent the latest technologies so the watch shows almost perfect consistency of functionality. Grand Seiko uses Micro Electro Mechanical Systems (MEMS) technology in its manufacture and highly detailed machining processes to enable high-precision timekeeping.
MEMS is a highly advanced semiconductor manufacturing technology that makes it possible to manufacture lightweight parts with extreme precision. It is this technology that makes the mechanical movement of the Grand Seiko watch sound smooth doesn't seem like other mechanical watches. Some of the specially adapted versions of Caliber 9S have a big difference, this version has +4/-2 seconds of precision per day.