The Seiko 5P31-507A is a watch model based on the 5P31 movement.
Parts List
| ESBW17HM01 | crystal |
| 35M81NA1 | crown |
| 0F230BAA3 | case back gasket - case back gasket |
| 86581755 | crystal gasket - plastic gasket for crystal |
| Z1347G | band - metal band |
| Z1347G-BK5G | clasp - clasp |
| 1BE055LABDG | others - hour hand |
| 3BA125F1BNG | others - second hand |
| EB0055B01 | others - crown and stem gasket |
| A160BS | others - push pin |
| 5P315070 | others - case back |
| 5P31507A75 | others - case |
| 5P315100XB14 | others - dial |
| 5P315100XG14 | others - dial |
| 82803170 | others - case ring |
| 08T01DGH | others - hour hand |
| 08SC29NG | others - second hand |
| 08T05DGM | others - minute hand |