The Seiko 4N20-1040 is a watch model based on the 4N20 movement.
Parts List
| 155A02SN02 | crystal - crystal |
| 25M31NA1 | crown |
| 0F140BA1S | case back gasket - case back gasket |
| E024CZ | band - band |
| E024DZ | band - band |
| 2CG050LABDG | others - minute hand |
| 0351155 | others - winding stem |
| DZ0040B01 | others - crown and stem gasket |
| 81606439 | others - bracelet fixing pin |
| 81190055 | others - bracelet fixing pipe |
| 81606679 | others - bracelet fixing pin |
| 82833415 | others - case ring |
| 4N2010407EA | others - case |
| 4N201040 | others - case back |
| 4N2010407NA | others - case |
| 4N201690XB15 | others - dial |
| 4N201690XS15 | others - dial |
| 4N2061 | others - machine code |
| 1CG035LABDG | others - hour hand |
| 04Y01DGH | others - hour hand |