The Seiko 5931-5020 is a watch model based on the 5931 movement.
Parts List
| RE4N51KN00 | crystal |
| 35N47NA5 | crown |
| 0H2720B01 | case back gasket |
| DZ0065B01 | case back gasket - button gasket |
Caliber 5931
Seiko 5931-5020 Watch Guide
The Seiko 5931-5020 is a watch model based on the 5931 movement.
| RE4N51KN00 | crystal |
| 35N47NA5 | crown |
| 0H2720B01 | case back gasket |
| DZ0065B01 | case back gasket - button gasket |