The Seiko V400-1020 is a watch model based on the V400 movement.
Parts List
| K02A59J20A | crystal - crystal |
| 6M35E3NNG0 | crown - crown |
| 0H1700B01 | case back gasket - bezel gasket |
| 4509LM | band - band |
| 4509LM-LK2 | band - link |
| 4509LM-BKL | clasp - buckle |
| 1DC040A1BAK | others - hour hand |
| 2DC055A1BAK | others - minute hand |
| 1DA035A1BNG | others - hour hand |
| 1DA037A1BNG | others - hour hand |
| 2DA052A1BNG | others - minute hand |
| 2DA055A1BNG | others - minute hand |
| 0351155 | others - winding stem |
| V40010 | others - machine code |
| V4003521XL14 | others - dial |
| V4003531XS29 | others - dial |
| V4005A08XL14 | others - dial |
| 81190055 | others - bracelet fixing pipe |
| 81606679 | others - bracelet fixing pin |
| 82838010 | others - case ring |
| V400102029A | others - case |
| V4001020 | others - case back |
| DZ0040B01 | others - crown and stem gasket |
| 1DA052A1BNG | others - hour hand |