The Seiko 5E31-7A20 is a watch model based on the 5E31 movement.
Parts List
| 285W44SR01 | crystal |
| 30MG0NA4 | crown |
| 0A2600N01 | case back gasket - case back gasket |
| AK17D | band - leather band |
| 1BF080L0BDG | others - hour hand |
| 2BF115L0BDG | others - minute hand |
| 0351624 | others - winding stem |
| 5E315 | others - machine code |
| 5E317A20 | others - case back |
| 5E317A20SB | others - case |
| 5E317A20XS14 | others - dial |
| 82823620 | others - case ring |
| 87020283 | others - back plate |
| A170BS | others - push pin |
| EZ0035B01 | others - crown and stem gasket |
| 3EA125F0ANG | others - second hand |