The Seiko 8420-6610 is a watch model based on the 8420 movement.
Parts List
| RE4N14SN00 | crystal |
| 25M16EX3 | crown |
| 0Z2100N01 | case back gasket |
| WI082 | others - other band |
| 06R02CSH | others - hour hand |
| DZ0041B01 | others - crown and stem gasket |
Caliber 8420
Seiko 8420-6610 Watch Guide