The Seiko 4N20-1120 is a watch model based on the 4N20 movement.
Parts List
| 155A02SN02 | crystal - crystal |
| 6M30B9SNW0 | crown - crown |
| 011600B01 | case back gasket |
| XX000 | band - band |
| 1CC040A1BAC | others - hour hand |
| 2CC060A1BAC | others - minute hand |
| 82841030 | others - case ring |
| 4N2011207EA | others - case |
| 4N201980XS19 | others - dial |
| 4N2061 | others - machine code |
| 0351155 | others - winding stem |
| DZ0040B01 | others - crown and stem gasket |