The Seiko 8420-5489 is a watch model based on the 8420 movement.
Parts List
| SA6N20SN | crystal |
| 25M02NA4 | crown - crown |
| 0G1500N01 | case back gasket |
Caliber 8420
Seiko 8420-5489 Watch Guide
The Seiko 8420-5489 is a watch model based on the 8420 movement.
| SA6N20SN | crystal |
| 25M02NA4 | crown - crown |
| 0G1500N01 | case back gasket |