The Seiko 4N20-5050 is a watch model based on the 4N20 movement.
Parts List
| RE3W05HK01 | crystal |
| 30M57NA1 | crown - crown |
| 0F140BAA3 | case back gasket - case back gasket |
| AC004BA11 | case back gasket - crown and stem gasket |
| A100BS | others - push pin (for mb) |
| 4N200150XS19 | others - dial |
| 4N205050 | others - case back |
| 4N20505075 | others - case |
| 4N2061 | others - machine code |
| 82833030 | others - case ring |
| 0351155 | others - winding stem |
| 04Y21A1M | others - minute hand |
| 04Y21AGH | others - hour hand |