The Seiko W620-4210 is a watch model based on the W620 movement.
Parts List
| ESHW15A30A | crystal - crystal |
| 0F300BAD1 | case back gasket - case back gasket |
| 80633919 | pusher - button |
| 80710259 | pusher - button |
| 8DA2JZ | band - band |
| 8DA4JZ | band - band |
| 8DA6JZ | band - band |
| 8DA5JZ | band - rubber band |
| 8DA7JZ | band - band |
| 8DA3JZ | band - rubber band |
| W6204210N2C | others - case |
| W6204210N2D | others - case |
| W6204210N2E | others - case |
| W6204210N2F | others - case |
| A130BS | others - push pin |
| W6204210N2B | others - case |
| W6204210N2A | others - case |
| AD006BA11 | others - crown and stem gasket |
| 81351639 | others - button spring |
| 83200211 | others - button spring clip |
| 81518259 | others - case back screw |