The Seiko 6431-5020 is a watch model based on the 6431 movement.
Parts List
| SA5N42GN00 | crystal - crystal |
| 35R34NA1 | crown - crown |
| 0A2600N01 | case back gasket - case back gasket |
| JK08A | band - band |
| JK07A | band - band |
| 10T28DGM | others - minute hand |
| 10T28NGH | others - hour hand |
| 10T04DGM | others - minute hand |
| 10T04N1H | others - hour hand |
| 0354641 | others - winding stem |
| 82700600 | others - case ring |
| 6431502048 | others - case |
| 64315040XS14 | others - dial |
| 64315050XB12 | others - dial |
| A180BS | others - push pin |
| 13SC04A2 | others - second hand |
Caliber 6431
