The Seiko Y431-5040 is a watch model based on the Y431 movement.
Parts List
| SA7N09AN00 | crystal |
| 45D51NK1 | crown |
| 45D51NN1 | crown |
Other models with the same movement
| Y431-0010 |
| Y431-0020 |
| Y431-0030 |
| Y431-5000 |
| Y431-5010 |
| Y431-5020 |
| Y431-5030 |
| Y431-5050 |
| Y431-5060 |
| Y431-5070 |
| Y431-5080 |