The Seiko 7431-0040 is a watch model based on the 7431 movement.
Parts List
| 330N11HN00 | crystal - crystal |
| 45N25NS1 | crown - crown |
| DA0070B01 | case back gasket - crown and stem gasket |
| 0H2700B01 | case back gasket - case back gasket |
| AC03A | band - band |
| AC150 | band - band |
| 12P01ASH | others - hour hand |
| 12P01ASM | others - minute hand |
| 1AA085A1BAC | others - hour hand |
| 3AA125F3A6S | others - second hand |
| 74310030XS19 | others - dial |
| 743110 | others - machine code |
| 81871775 | others - case bow |
| 0354083 | others - winding stem |
| 83138590 | others - case ring |
| 7431004011 | others - case |
| 7431004045 | others - case |
| 13SC09T2 | others - second hand |
| 2AA125A1BAC | others - minute hand |
Caliber 7431
