The Seiko 8420-6300 is a watch model based on the 8420 movement.
Parts List
| ES8N08SN00 | crystal |
| 26M02EE3 | crown |
| 26M02EX3 | crown |
| 0G1601N01 | case back gasket - case back gasket |
| WI075 | others - other band |
| WI076 | others - other band |
| 81501406 | others - screw |
| 06R38E1H | others - hour hand |
| 81501405 | others - case back screw |
| 06R38E1M | others - minute hand |
| DZ0041B01 | others - crown and stem gasket |
Caliber 8420
