The Seiko 5E31-5A50 is a watch model based on the 5E31 movement.
Parts List
| SABW32SN01 | crystal - crystal |
| 30M58NA1 | crown - crown |
| 30M52NA3 | crown |
| 0A2600B01 | case back gasket |
| AK61C | band - band |
| 10ST08DG | others - second hand |
| 09T04CLM | others - minute hand |
| 09TD6AGH | others - hour hand |
| 09TD6AGM | others - minute hand |
| 10T16AGH | others - hour hand |
| 0351624 | others - winding stem |
| EZ0035B0A | others - crown and stem gasket |
| 5E315A50SJ | others - case |
| 82821280 | others - case ring |
| 5E315A50 | others - case back |
| 5E315A50SJA | others - case |
| 5E311 | others - machine code |
| 5E315A60XG14 | others - dial |
| 5E315A60XG24 | others - dial |
| 87020283 | others - back plate |
| A180BS | others - push pin |
| EZ0035B01 | others - crown and stem gasket |