The Seiko 5P31-7A50 is a watch model based on the 5P31 movement.
Parts List
| 280WB8SN01 | crystal |
| 35M82EH1 | crown |
| 35M82NS1 | crown - crown |
| 0A2600N01 | case back gasket - case back gasket |
| LK21D | band - leather band |
| 82802420 | others - case ring |
| 5P317A30XS29 | others - dial |
| 5P317A50 | others - case back |
| 5P317A50RE | others - case |
| 5P319 | others - machine code |
| A180BS | others - push pin |
| 0351670 | others - winding stem |
| 11TD0FSH | others - hour hand |
| 11TD0FSM | others - minute hand |
| 13SC04ES | others - second hand |
| 0Z0060B01 | others - crown and stem gasket |