The Seiko W620-4240 is a watch model based on the W620 movement.
Parts List
| K00P05L20A | crystal - crystal (inorganic) |
| 0F270BAA1 | case back gasket - case back gasket |
| 86640155 | crystal gasket - plastic gasket for crystal |
| 80631959 | pusher - button |
| 80633750 | pusher - front button |
| W164AZ | band - band |
| W165AZ | band - band |
| A150BS | others - push pin |
| W620424079A | others - case |
| W620424079B | others - case |
| 82836970 | others - case ring |
| 81351639 | others - button spring |
| 83200273 | others - button spring clip |
| AD006BA11 | others - crown and stem gasket |
| 81350760 | others - button spring (front) |