The Seiko 7431-5040 is a watch model based on the 7431 movement.
Parts List
| ESHN41HN00 | crystal |
| 30N43NA5 | crown - crown |
| 30N49NA1 | crown - crown |
| 30N49NS1 | crown - crown |
| DZ0065B01 | case back gasket - button gasket |
| 0H2400B01 | case back gasket - case back gasket |
Caliber 7431
