The 25th anniversary of the 9S mechanical calibers

25 years of innovation and evolution

1998 saw the release of a new generation of Grand Seiko mechanical calibers. Designed and manufactured entirely in-house, the first 9S series calibers were so innovative in design and functionality that they allowed the creation of a new and higher Grand Seiko Standard and provided a platform on which, over the past 25 years, a whole new series of high-precision mechanical calibers has been built.

In celebration of the 25th anniversary of the 9S series, Grand Seiko invites you to explore the ideas, technologies and designs that lie at the heart of these remarkable calibers. In a series of 25 articles to be released across the coming year, the full story of the 9S series will be told. Welcome to the world of one of the finest mechanical movements ever created.