The Seiko 1230-5439 is a watch model based on the 1230 movement.
Parts List
| ESJN23SE10 | crystal |
| 25N13DA1 | crown |
| 0H1550B01 | case back gasket |
| DZ0040B01 | others - crown and stem gasket |
Caliber 1230
Seiko 1230-5439 Watch Guide
The Seiko 1230-5439 is a watch model based on the 1230 movement.
| ESJN23SE10 | crystal |
| 25N13DA1 | crown |
| 0H1550B01 | case back gasket |
| DZ0040B01 | others - crown and stem gasket |