The Seiko 5P31-6A40 is a watch model based on the 5P31 movement.
Parts List
| 275W26SN01 | crystal |
| 35MA8NS1 | crown |
| 35MA8NA1 | crown |
| 0A2500N01 | case back gasket - rotating bezel gasket |
| AK05C | band - band |
| AK02C | band - leather band |
| AK04C | band - leather band |
| AK01C | band - band |
| 5P316A4075 | others - case |
| 5P316A407E | others - case |
| 5P316A80X999 | others - dial |
| 5P316A90XG19 | others - dial |
| 5P316B00XS19 | others - dial |
| 5P319 | others - machine code |
| A170BS | others - push pin |
| 82803260 | others - case ring |
| 0351670 | others - winding stem |
| 11T22NAH | others - hour hand |
| 11T22NAM | others - minute hand |
| 13SC04A2 | others - second hand |
| 13SC04ES | others - second hand |
| 13SC04AB | others - second hand |
| 11TA8AGH | others - hour hand |
| 0Z0060B01 | others - crown and stem gasket |
| 11TA8AGM | others - minute hand |
| 11TA8ASH | others - hour hand |
| 11TA8ASM | others - minute hand |