The Seiko Y520-0A50 is a watch model based on the Y520 movement.
Parts List
| 140A02LN03 | crystal - crystal (inorganic) |
| 25M18NV1 | crown - crown |
| 25M18NF1 | crown |
| 0E130NA1S | case back gasket |
| RT86A | band - metal band |
| RT87A | band - metal band |
| 03V10DAH | others - hour hand |
| 81182699 | others - bracelet fixing pipe |
| 81609399 | others - bracelet fixing pin |
| 0351930 | others - winding stem |
| EZ0035B01 | others - crown and stem gasket |
| 03V10DAM | others - minute hand |