The Seiko 8420-5540 is a watch model based on the 8420 movement.
Parts List
| RE1N92SN00 | crystal - crystal |
| 25M02NA4 | crown - crown |
| 0Z0034B01 | case back gasket - crown and stem gasket |
| 0Z1800N01 | case back gasket |
| MK58A | band - band |
| 05R28AGH | others - hour hand |
| 05R02CLM | others - minute hand |
| 06R26AGH | others - hour hand |
| 06R26CGM | others - minute hand |
| 83117390 | others - case ring |
| 84205700XG18 | others - dial |
| 84205710XS19 | others - dial |
| A140BS | others - push pin |
| 8420554025 | others - case |
| 0354815 | others - winding stem |
| DZ0041B01 | others - crown and stem gasket |
Caliber 8420
