The Seiko W820-4000 is a watch model based on the W820 movement.
Parts List
| 0F340BAA1 | case back gasket - case back gasket |
| 0H2600B01 | case back gasket - case back gasket |
| 80637592 | pusher - button |
| 8AM0JZ | band |
| 8AM1JZ | band - band |
| 8AG6JZ | band - rubber band |
| 8AG7JZ | band - rubber band |
| T180CS | others - push pin |
| W8204000N2B | others - case |
| 86315295 | others - rotating bezel |
| W8204000N2A | others - case |
| 86315290 | others - rotating bezel |
| 83200273 | others - button spring clip |
| 81351630 | others - button spring |
| AD006BA11 | others - crown and stem gasket |
| 81518099 | others - case back screw |
Other models with the same movement