The Seiko 4N20-5240 is a watch model based on the 4N20 movement.
Parts List
| ES1A09SN02 | crystal |
| 30M57NA1 | crown - crown |
| 0H1600B01 | case back gasket - case back gasket |
| AC004BA11 | case back gasket - crown and stem gasket |
| DK51D | band - leather band |
| DK52D | band - leather band |
| 06Y19JCH | others - hour hand |
| 0351155 | others - winding stem |
| 4N200900XA14 | others - dial |
| 4N200900XA24 | others - dial |
| 4N205240 | others - case back |
| 4N20524026 | others - case |
| 4N205240FY | others - case |
| 4N2061 | others - machine code |
| 82850870 | others - case ring |
| 89942935 | others - back plate |
| A100AS | others - push pin |
| 06Y19JGM | others - minute hand |