Grand Seiko Heritage Automatic Spring Drive 3-Day SBGA259

The SBGA211 is powered by Spring Drive, Grand SeikoÕs unique caliber, which combines the motive force of a mainspring found with the high precision of a quartz watch.

The case and bracelet are made with high-intensity titanium, providing a scratch and corrosion resistant finish, making it 30% lighter than stainless steel and a pleasure to wear.

The blue steel second hand moves smoothly in glide motion, and glows over the contrasting pure white face to create an even more dramatic movement.

It has a 72-hour (3-day) power reserve, and a power reserve indicator on the bottom left of the dial.

Calibre 9R65:

Grand Seiko unveiled Spring Drive in 1999, but its lack of a sufficiently effective automatic winding mechanism and 72-hour power reserve prevent its adoption in the Grand Seiko line. After a further four years of development, the first Grand Seiko 9R Spring Drive was created.

The winding system and drive time were improved from the existing 48-hour manual winding system to an automatic 72-hour power reserve. The automatic winding mechanism uses Seiko's original Magic Lever mechanism developed in 1959, but with improved productivity, maintainability, and durability to enhance winding efficiency.

Calibre 9R65 is currently the most standard of the 9R Spring Drive movements, and is used in many Grand Seiko models.

Winding mechanism
Automatic with manual winding

Accuracy
+1 second per day

Power reserve
Approximately 72 hours

Number of jewels
30 jewels

Features
- Power reserve indicator
- Date display