The Seiko 5E31-6A20 is a watch model based on the 5E31 movement.
Parts List
| 265W18SR01 | crystal |
| 25M44NA4 | crown |
| 0A2500N01 | case back gasket - rotating bezel gasket |
| OH2395N01 | case back gasket |
| AB56A | band - metal band |
| 11X38DGH | hand - hour hand |
| 11X38DGM | hand - minute hand |
| 10ST08DG | others - second hand |
| 0351624 | others - winding stem |
| 81180229 | others - bracelet fixing pipe |
| 81604259 | others - bracelet fixing pin |
| 82814300 | others - case ring |
| 5E312 | others - machine code |
| 5E316A20 | others - case back |
| 5E316A20SF | others - case |
| 5E316A30X914 | others - dial |
| 5E316A30XS14 | others - dial |
| 87020283 | others - back plate |
| EZ0035B01 | others - crown and stem gasket |