The Seiko 8420-5107 is a watch model based on the 8420 movement.
Parts List
| SA4N84SN00 | crystal |
| 25M02NA4 | crown - crown |
| 0Z0034B01 | case back gasket - crown and stem gasket |
| 0Z1601N01 | case back gasket |
Caliber 8420
Seiko 8420-5107 Watch Guide
The Seiko 8420-5107 is a watch model based on the 8420 movement.
| SA4N84SN00 | crystal |
| 25M02NA4 | crown - crown |
| 0Z0034B01 | case back gasket - crown and stem gasket |
| 0Z1601N01 | case back gasket |