![Slimmer, more precise and more powerful. A new Spring Drive movement marks a new beginning for Grand Seiko. | Grand Seiko Slimmer, more precise and more powerful. A new Spring Drive movement marks a new beginning for Grand Seiko. | Grand Seiko](https://www.grand-seiko.com/us-en/-/media/Images/GlobalEn/GrandSeiko/Home/news/20200305-10/2020030510img01jpg.jpg)
Slimmer, more precise and more powerful. A new Spring Drive movement marks a new beginning for Grand Seiko. | Grand Seiko
![Grand Seiko's Latest Spring Drive Caliber Powers Two 140th Anniversary Editions | WatchTime - USA's No.1 Watch Magazine Grand Seiko's Latest Spring Drive Caliber Powers Two 140th Anniversary Editions | WatchTime - USA's No.1 Watch Magazine](https://www.watchtime.com/wp-content/uploads/2021/10/Grand_Seiko_Heritage_collection_SLGA007_dialCU_1000-1024x728.jpg)
Grand Seiko's Latest Spring Drive Caliber Powers Two 140th Anniversary Editions | WatchTime - USA's No.1 Watch Magazine
H.M.Timepiece - Grand Seiko introduces a new generation Spring Drive calibre that is slimmer, even more precise and has a greater power reserve. Calibre 9RA5 takes Spring Drive technology to a new
![Slimmer, more precise and more powerful. A new Spring Drive movement marks a new beginning for Grand Seiko. | Grand Seiko Slimmer, more precise and more powerful. A new Spring Drive movement marks a new beginning for Grand Seiko. | Grand Seiko](https://www.grand-seiko.com/us-en/-/media/Images/GlobalEn/GrandSeiko/Home/news/20200305-10/2020030510img07png.png)
Slimmer, more precise and more powerful. A new Spring Drive movement marks a new beginning for Grand Seiko. | Grand Seiko
![Slimmer, more precise and more powerful. A new Spring Drive movement marks a new beginning for Grand Seiko. | Grand Seiko Slimmer, more precise and more powerful. A new Spring Drive movement marks a new beginning for Grand Seiko. | Grand Seiko](https://www.grand-seiko.com/us-en/-/media/Images/GlobalEn/GrandSeiko/Home/news/20200305-10/6bbc288d6b51432f68ea7815fbf84235jpg.jpg)