The Seiko V401-5020 is a watch model based on the V401 movement.
Parts List
| ESDW89LN01 | crystal |
| 30MA9NN1 | crown - crown |
| 30MA9NS1 | crown |
| AC004BA11 | case back gasket - crown and stem gasket |
| 0F170BAA3 | case back gasket - case back gasket |
| 86588990 | crystal gasket |
| WS76A | band - metal band |
| WS77A | band - metal band |
| 3BA075F1BNG | others - second hand |
| 3BA075F1BNS | others - second hand |
| 07SC43NG | others - second hand |
| 07SC43NS | others - second hand |
| 2AG070LABNG | others - minute hand |
| 0351155 | others - winding stem |
| T080BS | others - push pin |
| 07P65NSH | others - hour hand |
| 07P65NSM | others - minute hand |
| 06P21NGM | others - minute hand |
| 06P21NGH | others - hour hand |
| 1AG045LABNG | others - hour hand |