The Seiko W540-4A00 is a watch model based on the W540 movement.
Parts List
| 0F240BAAS | case back gasket - case back gasket |
| F1N2JG | band - band |
| F1N2KG | band - metal band |
| FFX6JZ | band - band |
| S130BS | others - push pin |
| W5404A0002 | others - case |
| W5404A0004 | others - case |
| W5404A0006E | others - case |
Other models with the same movement
| W540-0AA0 |
| W540-0AB0 |
| W540-0AC0 |
| W540-0AD0 |
| W540-X002 |