The Seiko 5E31-6C40 is a watch model based on the 5E31 movement.
Parts List
| 250W08SV01 | crystal |
| 35MF6NA1 | crown |
| 0A2500N0A | case back gasket - case back gasket |
| 86565960 | crystal gasket - plastic gasket for crystal |
| QB47A | band - metal band |
| 3AA125F0ANG | others - second hand |
| 0351624 | others - winding stem |
| 1BC070A0BAA | others - hour hand |
| 81180229 | others - bracelet fixing pipe |
| 81604259 | others - bracelet fixing pin |
| 82820420 | others - case ring |
| 5E315 | others - machine code |
| 5E316C40 | others - case back |
| 5E316C4061 | others - case |
| 5E316C50XS14 | others - dial |
| 87020283 | others - back plate |
| EA0040B0A | others - crown and stem gasket |
| 2BC105A0BCA | others - minute hand |