The Seiko 8420-0080 is a watch model based on the 8420 movement.
Parts List
| 170N04SN00 | crystal |
| 26M02EE3 | crown |
| 0G1601N01 | case back gasket - case back gasket |
| WI050 | others - other band |
| 07R26E1M | others - minute hand |
| 08R04E1H | others - hour hand |
| DZ0041B01 | others - crown and stem gasket |
| 170N04SN00 | crystal |
| 26M02EE3 | crown |
| 0G1601N01 | case back gasket - case back gasket |
| WI050 | others - other band |
| 07R26E1M | others - minute hand |
| 08R04E1H | others - hour hand |
| DZ0041B01 | others - crown and stem gasket |
Caliber 8420
