The Seiko 7431-5390 is a watch model based on the 7431 movement.
Parts List
| BA2W47HN00 | crystal |
| 35M81NA1 | crown |
| 0F250BAA3 | case back gasket - case back gasket |
| 86571590 | crystal gasket |
| JK28A | band - leather band |
| JK29A | band - leather band |
| 10P01DGM | others - minute hand |
| 2AA095A1BDG | others - minute hand |
| 3BA125F1BNG | others - second hand |
| EB0055B01 | others - crown and stem gasket |
| 10P01DGH | others - hour hand |
| 0354077 | others - winding stem |
| 743110 | others - machine code |
| 7431539075 | others - case |
| 74315530XB19 | others - dial |
| 74315540XG14 | others - dial |
| 82721930 | others - case ring |
| A180BS | others - push pin |
| 10P49NGH | others - hour hand |
| 10P49NGM | others - minute hand |
| 1AA060A1BNG | others - hour hand |
| 10SC27NG | others - second hand |
Caliber 7431
