9S64

Introduced in 2011, the Caliber 9S64 is a mechanical hand-wound movement. It provides a 3-day power reserve by utilizing a longer, thinner mainspring composed of SEIKO's exclusive SPRON510 alloy. Furthermore, it incorporates a shock-resistant and anti-magnetic SPRON610 balance spring, alongside MEMS-manufactured pallet and escape wheels to ensure reliable precision within the rigorous Grand Seiko standard of -3 to +5 seconds daily.