The Seiko 7731-5042 is a watch model based on the 7731 movement.
Parts List
| SADN09SE10 | crystal |
| 30NB7DA5 | crown |
| 0F230BA11 | case back gasket - case back gasket |
| LK55B | band - leather band |
| LK59B | band - band |
| 82700290 | others - case ring |
| 77315040XG14 | others - dial |
| 77315040XS14 | others - dial |
| 77315042 | others - case back |
| 7731504208A | others - case |
| 77315042EXA | others - case |
| 773162 | others - machine code |
| 89968111 | others - back plate |
| A180AS | others - push pin |
| 10P11CGH | others - hour hand |
| DZ0040B01 | others - crown and stem gasket |
| 0354371 | others - winding stem |
| 10P11CGM | others - minute hand |
| 10SC39VG | others - second hand |
| SADN09SE10 | crystal |
| 30NB7DA5 | crown |
| 0F230BA11 | case back gasket - case back gasket |
| LK55B | band - leather band |
| LK59B | band - band |
| 82700290 | others - case ring |
| 77315040XG14 | others - dial |
| 77315040XS14 | others - dial |
| 77315042 | others - case back |
| 7731504208A | others - case |
| 77315042EXA | others - case |
| 773162 | others - machine code |
| 89968111 | others - back plate |
| A180AS | others - push pin |
| 10P11CGH | others - hour hand |
| DZ0040B01 | others - crown and stem gasket |
| 0354371 | others - winding stem |
| 10P11CGM | others - minute hand |
| 10SC39VG | others - second hand |