The Seiko 4N20-5450 is a watch model based on the 4N20 movement.
Parts List
| ES3A11J20A | crystal - crystal |
| ES3A11J20C | crystal - crystal |
| 32M41NG1 | crown - crown |
| 32M41NA1 | crown - crown |
| 0H1500B01 | case back gasket - case back gasket |
| D0E5BZ | band - band |
| D0E5FZ | band - band |
| 1CE025L0BDG | others - hour hand |
| 2CE037L0BDG | others - minute hand |
| DA007BA11 | others - crown and stem gasket |
| 0351155 | others - winding stem |
| 81606439 | others - bracelet fixing pin |
| 81181459 | others - bracelet fixing pipe |
| 82863230 | others - case ring |
| 4N20545025A | others - case |
| 4N205450 | others - case back |
| 4N20545025B | others - case |
| 4N201740XG14 | others - dial |
| 4N201740XS14 | others - dial |
| 4N2061 | others - machine code |