The Seiko 4N20-5270 is a watch model based on the 4N20 movement.
Parts List
| ES1A37S20A | crystal |
| 25M69NA1 | crown |
| 0F180BAA1 | case back gasket - case back gasket |
| Z5460 | band - metal band |
| Z5461 | band - metal band |
| 1CB045A1BAX | others - hour hand |
| 0351155 | others - winding stem |
| DZ0040B01 | others - crown and stem gasket |
| 81181459 | others - bracelet fixing pipe |
| 81607199 | others - bracelet fixing pin |
| 4N201000XN14 | others - dial |
| 4N201000XS14 | others - dial |
| 4N205270 | others - case back |
| 4N2052706Y | others - case |
| 4N205270XH | others - case |
| 4N2061 | others - machine code |
| 82852090 | others - case ring |
| 2CB065A0BDG | others - minute hand |
| 2CB065A1BDG | others - minute hand |