The Seiko 7431-5120 is a watch model based on the 7431 movement.
Parts List
| ESKN61HE1F | crystal |
| 35NJ3NS1 | crown |
| 0H2200B01 | case back gasket - rotating bezel gasket |
| DZ0065B01 | case back gasket - button gasket |
| 0H2400B01 | case back gasket - case back gasket |
| SS01A | band - metal band |
| 09P31DZH | hand - hour hand |
| 09P31DZM | hand - minute hand |
| 09SC27NS | others - second hand |
| 3BA125F1BNS | others - second hand |
| 743110 | others - machine code |
| 7431512011 | others - case |
| 74315170XS17 | others - dial |
| 82701770 | others - case ring |
| A180BS | others - push pin |
| 0354077 | others - winding stem |
Caliber 7431
