The Seiko 5P31-5D40 is a watch model based on the 5P31 movement.
Parts List
| ESAW16SJ01 | crystal |
| 35MA8NA1 | crown |
| 0A2600N01 | case back gasket - case back gasket |
| AL69A | band - band |
| AL01B | band - leather band |
| 0351670 | others - winding stem |
| 5P315D40 | others - case back |
| 5P315D4075 | others - case |
| 5P315D40SA | others - case |
| 5P315E60XG18 | others - dial |
| 5P315E70X999 | others - dial |
| 5P319 | others - machine code |
| 82811160 | others - case ring |
| A190AS | others - push pin |
| 08T02ABH | others - hour hand |
| 08T02ABM | others - minute hand |
| 13SC04A2 | others - second hand |
| 0Z0060B01 | others - crown and stem gasket |
| 08T12AGM | others - minute hand |
| 08T12AGH | others - hour hand |