The Seiko 8420-6889 is a watch model based on the 8420 movement.
Parts List
| ES6N76SN00 | crystal |
| 25M10NA1 | crown |
| 0Z0034B01 | case back gasket - crown and stem gasket |
| 0G1900N01 | case back gasket - case back gasket |
Caliber 8420
Seiko 8420-6889 Watch Guide
The Seiko 8420-6889 is a watch model based on the 8420 movement.
| ES6N76SN00 | crystal |
| 25M10NA1 | crown |
| 0Z0034B01 | case back gasket - crown and stem gasket |
| 0G1900N01 | case back gasket - case back gasket |