The Seiko 5P31-5020 is a watch model based on the 5P31 movement.
Parts List
| RE1W17HN01 | crystal - crystal |
| 32M31NS1 | crown - crown |
| 0F240BAA3 | case back gasket - case back gasket |
| 86580310 | crystal gasket - plastic gasket for crystal |
| AA53B | band - band |
| 3BA075F1BNS | others - second hand |
| 07SC17NS | others - second hand |
| 07T05DSH | others - hour hand |
| 07T05DSM | others - minute hand |
| EB0055B01 | others - crown and stem gasket |
| 0351671 | others - winding stem |
| 82800270 | others - case ring |
| 5P31502061 | others - case |
| 5P315010XB13 | others - dial |
| 5P3161 | others - machine code |
| A160BS | others - push pin |