The Grand Seiko caliber 9R31 is a Spring Drive Manual movement. It is part of the 9R family of movements and it was introduced in 2019.
| Caliber | 9R31 |
| Type | Spring Drive Manual |
| Family | 9R |
| Year | 2019 |
Grand Seiko watches with caliber 9r31
SBGY002
Case reference: 9R31-0AA0
Type: Spring Drive Manual
Movement: 9R31
Case material: Yellow Gold
Year: 2019
SBGY003
Case reference: 9R31-0AB0
Type: Spring Drive Manual
Movement: 9R31
Case material: Stainless Steel
Year: 2019
SBGY005
Case reference: 9R31-0AC0
Type: Spring Drive Manual
Movement: 9R31
Case material: Stainless Steel
Year: 2020
SBGY007
Case reference: 9R31-0AD0
Type: Spring Drive Manual
Movement: 9R31
Case material: Stainless Steel
Year: 2021
SBGY008
Case reference: 9R31-0AE0
Type: Spring Drive Manual
Movement: 9R31
Case material: Rose Gold
Year: 2022