The Seiko 8420-5420 is a watch model based on the 8420 movement.
Parts List
| ESBN47SN00 | crystal |
| 25N01DA5 | crown |
| 0H1650B01 | case back gasket - case back gasket |
| 0Z0034B01 | case back gasket - crown and stem gasket |
Caliber 8420
Seiko 8420-5420 Watch Guide
The Seiko 8420-5420 is a watch model based on the 8420 movement.
| ESBN47SN00 | crystal |
| 25N01DA5 | crown |
| 0H1650B01 | case back gasket - case back gasket |
| 0Z0034B01 | case back gasket - crown and stem gasket |