The Seiko 7431-5050 is a watch model based on the 7431 movement.
Parts List
| SACN59HN00 | crystal |
| 30N49NA1 | crown - crown |
| OH2370B02 | case back gasket |
| DZ0065B01 | case back gasket - button gasket |
Caliber 7431
Seiko 7431-5050 Watch Guide
The Seiko 7431-5050 is a watch model based on the 7431 movement.
| SACN59HN00 | crystal |
| 30N49NA1 | crown - crown |
| OH2370B02 | case back gasket |
| DZ0065B01 | case back gasket - button gasket |