The Seiko 8420-7309 is a watch model based on the 8420 movement.
Parts List
| ES9N10SM01 | crystal |
| 22M02NA1 | crown |
| 0H1860N01 | case back gasket - case back gasket |
| DZ0040B01 | others - crown and stem gasket |
Caliber 8420
Seiko 8420-7309 Watch Guide
The Seiko 8420-7309 is a watch model based on the 8420 movement.
| ES9N10SM01 | crystal |
| 22M02NA1 | crown |
| 0H1860N01 | case back gasket - case back gasket |
| DZ0040B01 | others - crown and stem gasket |