The Seiko 5E31-5A40 is a watch model based on the 5E31 movement.
Parts List
| ESCW10SV01 | crystal |
| 25M44NA4 | crown |
| 0A2400N01 | case back gasket - case back gasket |
| AA11C | band - metal band |
| 10ST04DG | others - second hand |
| 0351624 | others - winding stem |
| 08T50ZGH | others - hour hand |
| 81180229 | others - bracelet fixing pipe |
| 81610299 | others - bracelet fixing pin |
| 5E311 | others - machine code |
| 5E315A40 | others - case back |
| 5E315A40SA | others - case |
| 5E315A50XS14 | others - dial |
| 82820180 | others - case ring |
| 87020283 | others - back plate |
| 08T50ZGM | others - minute hand |
| EZ0035B01 | others - crown and stem gasket |