The Seiko 4N20-0320 is a watch model based on the 4N20 movement.
Parts List
| 130A02SN02 | crystal - crystal |
| 30M57NA1 | crown - crown |
| 0F140BAA3 | case back gasket - case back gasket |
| AC004BA11 | case back gasket - crown and stem gasket |
| HK42C | band - band |
| HK41C | band - leather band |
| HK20C | band - leather band |
| HK21C | band - leather band |
| HK22C | band - leather band |
| HK23C | band - leather band |
| HK24C | band - leather band |
| 05Y31DGM | others - minute hand |
| 82833415 | others - case ring |
| 4N20032076 | others - case |
| 4N200320 | others - case back |
| 0351155 | others - winding stem |
| 4N200560XG19 | others - dial |
| 4N200690XG19 | others - dial |
| 4N2061 | others - machine code |
| 04Y03NGH | others - hour hand |