The Seiko Y520-0A40 is a watch model based on the Y520 movement.
Parts List
| 120W50LK01 | crystal |
| 25M18NV1 | crown - crown |
| 0H1100N01 | case back gasket |
| DZ95C | band - metal band |
| DZ96C | band - metal band |
| 02V02NGH | others - hour hand |
| 81182699 | others - bracelet fixing pipe |
| 81609399 | others - bracelet fixing pin |
| 0351930 | others - winding stem |
| 02V02NGM | others - minute hand |
| EZ0035B01 | others - crown and stem gasket |