Grand Seiko was introduced in December, 1960.

In order to achieve the high degree of accuracy to which Grand Seiko's watchmakers aspired, they created their own accuracy standard, and perfected the arts that were required to achieve this.

By the end of the 1960s, Seiko attained a level of accuracy that was ahead of its time and made it the winner in the accuracy competitions organised by the leading Swiss observatories. Success in mechanical watchmaking was only the beginning. It led to innovations in high-grade quartz technology and to the creation of Spring Drive, a calibre that opened a new horizon in the history of horology.