The Seiko 4N20-5150 is a watch model based on the 4N20 movement.
Parts List
| RE0A07S10A | crystal |
| 30M71NA4 | crown |
| 0F180BAA1 | case back gasket - case back gasket |
| DK35D | band - leather band |
| 2CE060L0BDG | others - minute hand |
| 05Y01DGH | others - hour hand |
| 4N200530XS14 | others - dial |
| 4N205150 | others - case back |
| 4N2051507NA | others - case |
| 4N2061 | others - machine code |
| 82842730 | others - case ring |
| A150BS | others - push pin |
| DZ0040B01 | others - crown and stem gasket |
| 0351155 | others - winding stem |
| 06Y05DGM | others - minute hand |