The Seiko 8420-7090 is a watch model based on the 8420 movement.
Parts List
| RE6N04GN00 | crystal |
| 25M22NA1 | crown |
| 0H2600N01 | case back gasket - case back gasket |
| LK66B | band - leather band |
| 0354815 | others - winding stem |
| 07R38CGH | others - hour hand |
| 82724080 | others - case ring |
| 84201790XR14 | others - dial |
| 84207090JM | others - case |
| A180AS | others - push pin |
| 07R38CGM | others - minute hand |
| DZ0041B01 | others - crown and stem gasket |
Caliber 8420
