The Seiko 8420-628A is a watch model based on the 8420 movement.
Parts List
| RE3N08SM02 | crystal |
| 26M06EE3 | crown |
| 0G1500N01 | case back gasket |
| WI078 | others - other band |
| 81501406 | others - screw |
| 03R02E1H | others - hour hand |
| 03R02E1M | others - minute hand |
| 03R06E1H | others - hour hand |
| DZ0041B01 | others - crown and stem gasket |
| 03R06E1M | others - minute hand |
Caliber 8420
