The Seiko 7731-5090 is a watch model based on the 7731 movement.
Parts List
| ES9N79SN00 | crystal |
| 32N13N05 | crown - crown |
| 0H2370B01 | case back gasket |
| JA09A | band - metal band |
| 11P01DGH | others - hour hand |
| DZ0040B01 | others - crown and stem gasket |
| 11SC25VG | others - second hand |
| 0354371 | others - winding stem |
| 773150901CA | others - case |
| 77315090XG14 | others - dial |
| 773162 | others - machine code |
| 82703330 | others - case ring |
| A170BS | others - push pin |
| 11P01DGM | others - minute hand |
| 2AB110LABDG | others - minute hand |