The Seiko 7731-5050 is a watch model based on the 7731 movement.
Parts List
| RE8N15SN00 | crystal - crystal |
| 30N59DW5 | crown - crown |
| 0H2150B02 | case back gasket |
| JB01A | band - band |
| 09SC21VG | others - second hand |
| 1AG060L0BDG | others - hour hand |
| 09P31DGM | others - minute hand |
| 09P31DGH | others - hour hand |
| 2AG090L0BDG | others - minute hand |
| 0354371 | others - winding stem |
| DZ0040B01 | others - crown and stem gasket |
| 773150501CA | others - case |
| 82702690 | others - case ring |
| 77315050XY14 | others - dial |
| 773162 | others - machine code |
| A180AS | others - push pin |