The Seiko Y520-5A90 is a watch model based on the Y520 movement.
Parts List
| RE2A06JR02 | crystal - crystal |
| 35MV4NA1 | crown - crown |
| 35MV4NS1 | crown - crown |
| 0E160NA1S | case back gasket - case back gasket |
| E067AB | band - band |
| E067BB | band - band |
| EB71BW | band - band |
| EB72AW | band - band |
| 02V02NSH | others - hour hand |
| 02V02NGH | others - hour hand |
| 03V20NGM | others - minute hand |
| Y5205A9075 | others - case |
| 82738960 | others - case ring |
| Y5205A9079 | others - case |
| 0351930 | others - winding stem |
| B080AS | others - push pin |
| Y5200 | others - machine code |
| Y5200C70XS14 | others - dial |
| Y5200C70XS24 | others - dial |
| Y5200C80XB13 | others - dial |
| Y5200C80XS13 | others - dial |
| 03V20NSM | others - minute hand |
| EZ0035B01 | others - crown and stem gasket |