The Seiko V401-5820 is a watch model based on the V401 movement.
Parts List
| BA2A39LN03 | crystal |
| 6M30A3NNG0 | crown - crown |
| 0F180BA1S | case back gasket - case back gasket |
| 8BL3KZ | band |
| 3BA075F1BNG | others - second hand |
| 1AC035A1BNG | others - hour hand |
| 2AC055A1BNG | others - minute hand |
| 0351155 | others - winding stem |
| DZ0040B01 | others - crown and stem gasket |