The Seiko 8420-5460 is a watch model based on the 8420 movement.
Parts List
| ES5N02SN00 | crystal |
| 30M46EX3 | crown |
| 0Z0034B01 | case back gasket - crown and stem gasket |
| 0Z1601N01 | case back gasket |
| WI047 | others - other band |
Caliber 8420
Seiko 8420-5460 Watch Guide