The Seiko V401-1840 is a watch model based on the V401 movement.
Parts List
| 165A02LN03 | crystal |
| 6M35C5NMG0 | crown - crown |
| 0F150BA1S | case back gasket - case back gasket |
| 70T8KZ | band - band |
| 7BM8YZ | band - leather band |
| 3BA075F1BNG | others - second hand |
| DZ0040B01 | others - crown and stem gasket |
| 0351155 | others - winding stem |
| E110CS | others - push pin |
| V40110 | others - machine code |
| V4015650XS14 | others - dial |
| D1601139 | others - bracelet fixing pin |
| 82809670 | others - case ring |
| V40118402SA | others - case |
| 1AE045LABNG | others - hour hand |
| 2AE065LABNG | others - minute hand |