The Seiko 8420-6450 is a watch model based on the 8420 movement.
Parts List
| RE3N76SN00 | crystal |
| 25M02NE3 | crown - crown |
| DG1630B2A | case back gasket |
| VI042 | others - other band |
| 07R24D1H | others - hour hand |
| 07R24D1M | others - minute hand |
| 07R44DGH | others - hour hand |
| DZ0041B01 | others - crown and stem gasket |
| 07R44DGM | others - minute hand |
Caliber 8420
