The Seiko 7731-5210 is a watch model based on the 7731 movement.
Parts List
| RECN63SV01 | crystal |
| 30NE1DA5 | crown - crown |
| 0F240NA11 | case back gasket |
| YK15B | band - band |
| 09SC21VG | others - second hand |
| DZ0040B01 | others - crown and stem gasket |
| 0354371 | others - winding stem |
| 82722830 | others - case ring |
| 7731521025A | others - case |
| 77315240XG14 | others - dial |
| 773162 | others - machine code |
| 89968111 | others - back plate |
| A180BS | others - push pin |
| 09S21DGH | others - hour hand |
| 09S21DGM | others - minute hand |