The SBGA203 features Grand Seiko's unique spring drive, a technology that no other company in the world has. The spring drive movement combines the beauty and complexity of an ordinary mechanical movement but with none of the inaccuracy--the spring drive will be at least as accurate as a good quartz watch. It also has the only truly smooth seconds hand in the industry. Like all Grand Seiko spring drives, a power reserve subdial is used that lets you know how much energy is left in the mainspring before the watch dies.
The successor to the SBGA003.