The Seiko 5E31-6D40 is a watch model based on the 5E31 movement.
Parts List
| 250P06SN02 | crystal - crystal |
| 35MF6NA1 | crown |
| 0F240NAAS | case back gasket - case back gasket |
| 86580120 | crystal gasket |
| GB32B | band - metal band |
| 0351624 | others - winding stem |
| 12ST06DA | others - second hand |
| 81181879 | others - bracelet fixing pipe |
| 82814640 | others - case ring |
| 81612799 | others - bracelet fixing pin |
| 5E315 | others - machine code |
| 5E316D40 | others - case back |
| 5E316D4098 | others - case |
| 5E316D50X914 | others - dial |
| 87020283 | others - back plate |
| 1BF075L2BCC | others - hour hand |
| EA0040B0A | others - crown and stem gasket |
| 2BF110L2BCC | others - minute hand |