Press Conference

Grand Seiko

SPRON and MEMS

Escape wheel and Palette made with MEMS

With SEIKO's proprietary alloy “SPRON 610” and the escape wheel and pallet manufactured by MEMS (Micro Electro Mechanical System), this new caliber provides a 72-hour power reserve and accuracy of -3 to +5 seconds per day. The case is polished by hand using SEIKO's special three-stage 'blade' polishing technique and has a clear and sharp mirror surface.