The Seiko 7431-6140 is a watch model based on the 7431 movement.
Parts List
| 240W13HN00 | crystal - crystal |
| 40E15NA1 | crown - crown |
| FH2780B0A | case back gasket - case back gasket |
| 86571690 | crystal gasket - plastic gasket for crystal |
| 86572010 | bezel gasket - plastic gasket for bezel |
| GL31A | band - band |
| 10P89DGH | others - hour hand |
| 10P89DGM | others - minute hand |
| 3AA125F1ANG | others - second hand |
| EB0055B0A | others - crown and stem gasket |
| 81606439 | others - bracelet fixing pin |
| 81180229 | others - bracelet fixing pipe |
| 0354077 | others - winding stem |
| 74316140SF | others - case |
| 82330891 | others - bezel |
| 82722039 | others - case ring |
| 81607379 | others - bracelet fixing pin |
| 743110 | others - machine code |
| 74316160XS14 | others - dial |
| 81332019 | others - spring |
| 81832272 | others - case bow |
| A160BS | others - push pin |
| 10SC23T1 | others - second hand |
Caliber 7431
