The Seiko 5P31-5A30 is a watch model based on the 5P31 movement.
Parts List
| RE5N26JM01 | crystal |
| 30MA6NA1 | crown - crown |
| 0G0055B01 | case back gasket - crown and stem gasket |
| 0H2600N01 | case back gasket - case back gasket |
| Z1314C | band - metal band |
| Z1350C | band - metal band |
| Z1350G | band - metal band |
| Z1350G-BK5G | clasp - clasp |
| Z1350C-BK5S | clasp - clasp |
| Z1314C-BK5S | clasp - clasp |
| 09T32ZGH | hand - hour hand |
| 09T32ZGM | hand - minute hand |
| 09T46DGM | hand - minute hand |
| 5P315A30 | others - case back |
| 5P315A3011 | others - case |
| 5P315A3025 | others - case |
| 5P315A40XN14 | others - dial |
| 5P315C00X984 | others - dial |
| 5P315C00X994 | others - dial |
| 5P319 | others - machine code |
| 82800200 | others - case ring |
| A160BS | others - push pin |
| 0351670 | others - winding stem |
| 10T42DGH | others - hour hand |
| 13SC04A2 | others - second hand |