The Seiko Y520-5B40 is a watch model based on the Y520 movement.
Parts List
| RE2A34JR02 | crystal - crystal |
| 40MC8NS1 | crown - crown |
| 0E140NA1S | case back gasket - case back gasket |
| W134AB | band - band |
| 04V56NSH | others - hour hand |
| 04V56NSM | others - minute hand |
| A110BS | others - push pin (for mb) |
| 0351930 | others - winding stem |
| 82738000 | others - case ring |
| Y5205B407E | others - case |
| EZ0035B01 | others - crown and stem gasket |