The Seiko 4N20-0240 is a watch model based on the 4N20 movement.
Parts List
| 180A02SN02 | crystal - crystal (sapphire) |
| 30M57NA1 | crown - crown |
| 0H1700B01 | case back gasket - bezel gasket |
| AC004BA11 | case back gasket - crown and stem gasket |
| MK29E | band - leather band |
| 1CC040A1BJG | others - hour hand |
| 06Y37JCH | others - hour hand |
| 06Y37NGH | others - hour hand |
| 0351155 | others - winding stem |
| 82841070 | others - case ring |
| 4N20024026 | others - case |
| 4N200450XS15 | others - dial |
| 4N2061 | others - machine code |
| A100AS | others - push pin |
| 06Y37JGM | others - minute hand |
| 06Y37DGM | others - minute hand |
| 2CC060A1BHG | others - minute hand |