The Seiko 4N01-0331 is a watch model based on the 4N01 movement.
Parts List
| 170N25JM01 | crystal |
| 32M61NN1 | crown |
| 0F150BAA | case back gasket |
| 0F150BAA5 | case back gasket - case back gasket |
| ZFA18Y | band |
| 3BA075F1BNG | others - second hand |
| 1BC045A1BNG | others - hour hand |
| 2BC065A1BNG | others - minute hand |
| A100BS | others - push pin (for mb) |
| 4N010330 | others - case back |
| 4N010331WG | others - case |
| 4N010741XB14 | others - dial |
| 4N0161 | others - machine code |
| 82851170 | others - case ring |
| DZ0040B01 | others - crown and stem gasket |
| 0351155 | others - winding stem |
| 06T09NGM | others - minute hand |
| 06T09NGH | others - hour hand |