The Seiko 8420-5710 is a watch model based on the 8420 movement.
Parts List
| ES5N84SN00 | crystal |
| 25M02NE3 | crown - crown |
| 0G1800N01 | case back gasket |
| MK13Z | band - leather band |
| A110AS | others - push pin |
| 07R17DHH | others - hour hand |
| 07R17DHM | others - minute hand |
| DZ0041B01 | others - crown and stem gasket |
Caliber 8420
