The Seiko 8420-5909 is a watch model based on the 8420 movement.
Parts List
| K01N54SM01 | crystal |
| 22N04NA1 | crown |
| 25N04NA3 | crown |
| 25N04NX3 | crown |
| DZ0030B01 | case back gasket |
| 0G1800N01 | case back gasket |
Caliber 8420
Seiko 8420-5909 Watch Guide
The Seiko 8420-5909 is a watch model based on the 8420 movement.
| K01N54SM01 | crystal |
| 22N04NA1 | crown |
| 25N04NA3 | crown |
| 25N04NX3 | crown |
| DZ0030B01 | case back gasket |
| 0G1800N01 | case back gasket |