The Seiko 5P31-6B50 is a watch model based on the 5P31 movement.
Parts List
| 255N06SN01 | crystal |
| 35MA8NS1 | crown |
| 0H2520N01 | case back gasket - case back gasket |
| LK33D | band - leather band |
| 11T12NBH | others - hour hand |
| 11T12NBM | others - minute hand |
| 0351670 | others - winding stem |
| 82803000 | others - case ring |
| 5P316B50 | others - case back |
| 5P316B504C | others - case |
| 5P316D00X913 | others - dial |
| 5P319 | others - machine code |
| A160BS | others - push pin |
| 11SC19XB | others - second hand |
| 0Z0060B01 | others - crown and stem gasket |