The Seiko 4N20-009S is a watch model based on the 4N20 movement.
Parts List
| 200WB9SK01 | crystal - crystal (inorganic) |
| 25M57DA1 | crown - crown |
| 0F170BAA3 | case back gasket - case back gasket |
| DL25B | band - band |
| 2CC080A1BNG | others - minute hand |
| 1CC055A1BNG | others - hour hand |
| A130AS | others - push pin (for lb) |
| 4N201330XG14 | others - dial |
| 4N2060 | others - machine code |
| DZ0040B01 | others - crown and stem gasket |
| 82832715 | others - case ring |
| 4N20009S75 | others - case |
| 4N20009S | others - case back |