The Seiko 8420-0120 is a watch model based on the 8420 movement.
Parts List
| 195N06SN00 | crystal |
| 25M10EZ1 | crown |
| 0G1900N01 | case back gasket - case back gasket |
| PK34Z | band - leather band |
| A120AS | others - push pin |
| 08V14CGH | others - hour hand |
| 08V14CGM | others - minute hand |
| DZ0041B01 | others - crown and stem gasket |
Caliber 8420
