The Seiko 7431-5400 is a watch model based on the 7431 movement.
Parts List
| ES9W45HN00 | crystal |
| 35M27NA1 | crown |
| 0F250BAA3 | case back gasket - case back gasket |
| 86571710 | crystal gasket |
| JA17A | band - metal band |
| 09P03DGM | others - minute hand |
| 09SC27NG | others - second hand |
| 3BA125F1BNG | others - second hand |
| EB0055B01 | others - crown and stem gasket |
| 09P03DGH | others - hour hand |
| 0354077 | others - winding stem |
| 743110 | others - machine code |
| 7431540098 | others - case |
| 74315550XG14 | others - dial |
| 82722050 | others - case ring |
| A180BS | others - push pin |
Caliber 7431
