The Seiko 8420-5600 is a watch model based on the 8420 movement.
Parts List
| ES5N64SN00 | crystal |
| 26M02EE3 | crown |
| 26M02EX3 | crown |
| 0G1500N01 | case back gasket |
| 05R14DGH | others - hour hand |
| 05R14DGM | others - minute hand |
| 05R14DSH | others - hour hand |
| 05R14DSM | others - minute hand |
| WI055 | others - other band |
| WI056 | others - other band |
| DZ0041B01 | others - crown and stem gasket |
Caliber 8420
