The Seiko Y520-0C20 is a watch model based on the Y520 movement.
Parts List
| 120A14JN02 | crystal - crystal |
| 6M30D2SNW1 | crown - crown (3h) |
| 6M30D2SNG2 | crown - crown |
| 0F110BA1S | case back gasket - case back gasket |
| W351BB | band - band |
| W352AB | band - band |
| 04V02JSH | others - hour hand |
| 04V02JSM | others - minute hand |
| 0351930 | others - winding stem |
| 82725880 | others - case ring |
| Y5200C2001A | others - case |
| Y5200C2002A | others - case |
| DB004BAD1 | others - crown and stem gasket |
| 04V02DGM | others - minute hand |
| 04V02DGH | others - hour hand |