The Seiko 2J31-0A50 is a watch model based on the 2J31 movement.
Parts List
| 185A02SN01 | crystal - crystal (sapphire) |
| 30MK8NA4 | crown - crown |
| 0F170NA1S | case back gasket - case back gasket |
| DA47CW | band - band |
| DA36CW | band - band |
| DA36BW | band - band |
| DA36CW-BJ00 | clasp - buckle |
| DA47CW-BJ00 | clasp - buckle |
| 1BC050A1BAA | others - hour hand |
| 2BC075A1BCA | others - minute hand |
| 0351400 | others - winding stem |
| 82837780 | others - case ring |
| 07SC06DG | others - second hand |
| 1BA050A1BAF | others - hour hand |
| 2J310A50TZB | others - case |
| 2J310A50TZC | others - case |
| 2J310A60XA19 | others - dial |
| 2J310A70XA19 | others - dial |
| 2J310A80X914 | others - dial |
| 2J310B10XG14 | others - dial |
| 2J314 | others - machine code |
| A120AS | others - push pin |
| 2J310A5075 | others - case |
| 2J310A50 | others - case back |
| 2J310A50TZ | others - case |
| EZ0035B01 | others - crown and stem gasket |
| 2BA075A1BAF | others - minute hand |
Other models with the same movement