The Seiko 8420-0139 is a watch model based on the 8420 movement.
Parts List
| 25M04NA1 | crown - crown |
| 0H1600N01 | case back gasket - case back gasket |
Caliber 8420
Seiko 8420-0139 Watch Guide
The Seiko 8420-0139 is a watch model based on the 8420 movement.
| 25M04NA1 | crown - crown |
| 0H1600N01 | case back gasket - case back gasket |