The Seiko 7731-5240 is a watch model based on the 7731 movement.
Parts List
| SAEN87SN00 | crystal - crystal |
| 30NE1DA5 | crown - crown |
| 0F230NA11 | case back gasket |
| GK57A | band - band |
| 09SC21VG | others - second hand |
| 09S09VGH | others - hour hand |
| 09S09VGM | others - minute hand |
| 09S41JGH | others - hour hand |
| 09S41JGM | others - minute hand |
| 7731524025B | others - case |
| 7731524025C | others - case |
| 7731524025D | others - case |
| 77315270XG14 | others - dial |
| 77315280XG18 | others - dial |
| 773162 | others - machine code |
| 89968111 | others - back plate |
| A170BS | others - push pin |
| DZ0040B01 | others - crown and stem gasket |
| 0354371 | others - winding stem |
| 7731524025A | others - case |
| 82721650 | others - case ring |
| 77315240 | others - case back |