SBGW231
Current
Grand Seiko · Heritage
Heritage Hand-Wound
- Diameter
- 37.3 mm
- Movement
- Manual
Grand Seiko caliber
Grand Seiko 9S64
Sourced specifications: manual winding, 72-hour power reserve, and 28,800 vph. Watchfari lists 1 reference using the Grand Seiko 9S64. Every sourced case diameter here is 37.3 mm. Every sourced movement here is manual. All sourced cases are stainless steel.
1 reference
Specifications
Value · source- Jewels
- unknown
- no source
- Frequency (vph)
- 28800
- Derived 80%
- Power reserve (hours)
- 72
- Derived 85%
- Winding
- Manual
- Derived 90%
- Complications
- unknown