The Seiko W620-4130 is a watch model based on the W620 movement.
Parts List
| BA0P17L30D | crystal - crystal |
| BA0P17L30E | crystal - crystal |
| BA0917L30D | 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 |
| F0N4AZ | band - band |
| F0N4BZ | band - band |
| 6023JZ | band |
| 81351639 | others - button spring |
| W62041307SA | others - case |
| A180BS | others - push pin |
| W620413079A | others - case |
| 82836970 | others - case ring |
| W620413079B | others - case |
| W620413079C | others - case |
| W620413079D | others - case |
| W620413079E | others - case |
| W6204130 | others - case back |
| 83200273 | others - button spring clip |
| 81351630 | others - button spring |
| AD006BA11 | others - crown and stem gasket |
| 83200219 | others - button spring clip |