The Seiko 8420-5239 is a watch model based on the 8420 movement.
Parts List
| ES4N00SN | crystal |
| 25M04NA1 | crown - crown |
| 25M02NA1 | crown |
| 0G1700N | case back gasket |
Caliber 8420
Seiko 8420-5239 Watch Guide
The Seiko 8420-5239 is a watch model based on the 8420 movement.
| ES4N00SN | crystal |
| 25M04NA1 | crown - crown |
| 25M02NA1 | crown |
| 0G1700N | case back gasket |