Grand Seiko SBGL
Introduced in 2006, the SBGL family was the first to use Seiko's calibre 9S67, their second-generation modern mechanical movement. This movement boasted a 72 hour power reserve thanks to a Spron 510 mainspring among other improvements. It also features a power reserve indicator, a complication not found on other mechanical Grand Seiko models outside the Spring Drive line. All SBGL watches are automatic mechanical watches with a date window.
- 9S67 – Automatic 72 hr power with indicator
- 2006 - Grand Seiko SBGL001, SBGL003, SBGL005
- SBGL009, SBGL011
- SBGL013, SBGL015
- 2008 - SBGL017