The Seiko 6309-8440 is a watch model based on the 6309 movement.
Parts List
| 40M58NA1 | crown - crown |
| 40M58NS1 | crown - crown |
| DJ2990B | case back gasket |
| DJ0060B | others - crown gasket |
Caliber 6309
Seiko 6309-8440 Watch Guide
The Seiko 6309-8440 is a watch model based on the 6309 movement.
| 40M58NA1 | crown - crown |
| 40M58NS1 | crown - crown |
| DJ2990B | case back gasket |
| DJ0060B | others - crown gasket |