The Seiko 5P31-6B90 is a watch model based on the 5P31 movement.
Parts List
| 265W24SN02 | crystal |
| 35MA8NA1 | crown |
| 0A2500B01 | case back gasket - case back gasket |
| LK68D | band - band |
| 11TE2AGM | others - minute hand |
| 5P316B9075 | others - case |
| 82803000 | others - case ring |
| 5P316B90 | others - case back |
| 5P316D60XS19 | others - dial |
| 5P319 | others - machine code |
| A170BS | others - push pin |
| 0351670 | others - winding stem |
| 13SC04A2 | others - second hand |
| 11TE2AGH | others - hour hand |
| 0Z0060B01 | others - crown and stem gasket |