The Seiko 7431-5450 is a watch model based on the 7431 movement.
Parts List
| ESZN19JN01 | crystal - crystal |
| 40MS3NG1 | crown - crown |
| 0G2710B02 | case back gasket |
| DZ0065B01 | case back gasket - button gasket |
| YK21B | band - band |
| 3BA125F1BNG | others - second hand |
| 08P49AAH | others - hour hand |
| 08P49AAM | others - minute hand |
| 0354077 | others - winding stem |
| 7431545025 | others - case |
| 82731750 | others - case ring |
| 743110 | others - machine code |
| 74315610XS19 | others - dial |
| A150BS | others - push pin |
| 08SC29NG | others - second hand |
Caliber 7431
