The Seiko 8420-5390 is a watch model based on the 8420 movement.
Parts List
| ES4N92SN00 | crystal - crystal |
| 30M36NA3 | crown - crown |
| 0G1700N01 | case back gasket |
| 0Z0034B01 | case back gasket - crown and stem gasket |
| ZK25A | band - band |
| A110BS | others - push pin (for mb) |
| 84205450XG14 | others - dial |
| 8420539025 | others - case |
| 82702580 | others - case ring |
| 0354815 | others - winding stem |
| 06R13DGH | others - hour hand |
| 07R03DGM | others - minute hand |
| DZ0041B01 | others - crown and stem gasket |
Caliber 8420
