The Seiko 5E31-5A90 is a watch model based on the 5E31 movement.
Parts List
| ESDW04SN01 | crystal - crystal |
| 25M20NA3 | crown |
| 25M20NS3 | crown |
| 0A2600N01 | case back gasket - case back gasket |
| 86582000 | crystal gasket - plastic gasket for crystal |
| VI211 | band - band |
| VI170 | band - band |
| 81932801 | clasp - clasp |
| 81932809 | clasp - clasp |
| 10ST08DS | others - second hand |
| 09TE4DGH | others - hour hand |
| 09TE4DGM | others - minute hand |
| 09TE4DSH | others - hour hand |
| 09TE4DSM | others - minute hand |
| 10ST08DG | others - second hand |
| 0351624 | others - winding stem |
| 5E311 | others - machine code |
| 5E315B01X915 | others - dial |
| 5E315B61X915 | others - dial |
| 5E315A9061 | others - case |
| 82823120 | others - case ring |
| 5E315A90 | others - case back |
| 5E315A9075 | others - case |
| 87020283 | others - back plate |
| EZ0035B01 | others - crown and stem gasket |