In 2020, the 60th anniversary of Grand Seiko’s creation, the proprietary Spring Drive mechanism takes another step forward in the form of a next-generation movement, Caliber 9RA5. It is the creation of expert technicians at the Shinshu Watch Studio, who have taken the Grand Seiko ideals of “accuracy, legibility and beauty” to a new higher level of perfection.
Caliber 9RA5 delivers an accuracy rate of ±10 seconds per month and, despite being slim, has a power reserve of 5 days. Furthermore, the movement’s appearance has been painstakingly finished to reffect both its quality and the area from which it comes. “The ideal we aimed for was to create the best Spring Drive movement,” says Eiichi Hiraya who was responsible for Caliber 9RA5’s design at the Shinshu Watch Studio. He was very aware of the importance of the moment. Caliber 9RA5 is one of the main springboards for the next 60 years of Grand Seiko and so was created to open a new chapter in its history.