Grand Advances

Three innovations set the revolutionary Caliber 9SA5 apart: The Dual Impulse Escapement, Grand Seiko’s Free-sprung Balance, and the Horizontal Gear Train. Add in a powerful new look and it’s a fitting completion to Grand Seiko’s exciting 60th Anniversary celebration.
Words by Sandy Lindsey | November 26, 2020 | Luxury

Developed from scratch exclusively for Grand Seiko, Caliber 9SA5 will be the foundation upon which a whole new generation of Grand Seiko mechanical watches will be created. Nine years in development and deploying all the skills and experience that Grand Seiko has gained over the past 60 years, 9SA5 is without a doubt the finest mechanical caliber Grand Seiko has ever created. The 9SA5 has a precision rate of +5 to –3 seconds a day and a power reserve of 80 hours, and yet is 15% slimmer than the current Grand Seiko high beat caliber. The precision, power and slimness of Caliber 9SA5 are the result of the radical re-design of three key structures and components within them, for which several patents are either already granted or pending. With its stainless-steel case and a dial in deep, shimmering blue, this new creation will be available this month in a limited edition of 1,000 at Grand Seiko Boutiques and select retailers worldwide;