The Seiko 7431-5020 is a watch model based on the 7431 movement.
Parts List
| SABN91LN00 | crystal |
| 35M27NA1 | crown |
| 35M27NS1 | crown |
| 0G260BAA1 | case back gasket |
| EB0055B0A | others - crown and stem gasket |
Caliber 7431
Seiko 7431-5020 Watch Guide
The Seiko 7431-5020 is a watch model based on the 7431 movement.
| SABN91LN00 | crystal |
| 35M27NA1 | crown |
| 35M27NS1 | crown |
| 0G260BAA1 | case back gasket |
| EB0055B0A | others - crown and stem gasket |