The Seiko Y520-0A20 is a watch model based on the Y520 movement.
Parts List
| 120A02LN03 | crystal - crystal |
| 25M18NV1 | crown - crown |
| 25M18NF1 | crown |
| 0H1100N01 | case back gasket |
| DZ85C | band - metal band |
| ZZ89A | band - metal band |
| DZ86C | band - metal band |
| ZZ88A | band - metal band |
| 04V32DAM | others - minute hand |
| 03V06NCH | others - hour hand |
| 04V32DAH | others - hour hand |
| 81182699 | others - bracelet fixing pipe |
| 81609399 | others - bracelet fixing pin |
| 0351930 | others - winding stem |
| EZ0035B01 | others - crown and stem gasket |
| 03V06NCM | others - minute hand |