The Seiko 5A70-0420 is a watch model based on the 5A70 movement.
Parts List
| 180N12SN00 | crystal - crystal |
| 25M16EX3 | crown |
| 25M16EE3 | crown |
| 0H1800N01 | case back gasket - case back gasket |
| WI265 | others - other band |
| WI266 | others - other band |
| 07VA2JGH | others - hour hand |
| 07VA2JSH | others - hour hand |
| 07VA2JSM | others - minute hand |
| 07VA2JGM | others - minute hand |
| DZ0041B01 | others - crown and stem gasket |