The Seiko W620-4170 is a watch model based on the W620 movement.
Parts List
| BA0P17L30D | crystal - crystal |
| BA0P17L30A | crystal - crystal (inorganic) |
| BA0P17L30B | crystal - crystal (inorganic) |
| BA0P17L30C | crystal - crystal (inorganic) |
| 0F270BAA5 | case back gasket - case back gasket |
| 86640130 | crystal gasket - plastic gasket for crystal |
| 80631959 | pusher - button |
| 80631951 | pusher - button |
| 80633731 | pusher - button |
| 80633730 | pusher - front button |
| 6024KZ | band |
| 6023JZ | band |
| 83200273 | others - button spring clip |
| AD006BA11 | others - crown and stem gasket |