The Seiko W307-4020 is a watch model based on the W307 movement.
Parts List
| EG0115B01 | case back gasket - button gasket |
| 0Z2900B01 | bezel gasket - dichtung |
| 8061658A | pusher - button |
| 8061658B | pusher |
| NO | band - leather band |
| 173LC | band |
| 173LCP | band - band |
| 359LC | band - leather band |
| A190BS | others - push pin |
| W3070 | others - machine code |
| W3074020N2B | others - case |
| W3074020N2C | others - case |
| W3074020N2 | others - case |
| W3074020N2A | others - case |
Other models with the same movement
| W307-4000 |
| W307-4010 |
| W307-4030 |
| W307-4040 |
| W307-4050 |
| W307-4060 |
| W307-4070 |
| W307-4090 |
| W307-4130 |
| W307-4A00 |
| W307-4A10 |