The Seiko 6431-5100 is a watch model based on the 6431 movement.
Parts List
| SA3W36GN00 | crystal - crystal |
| 35M82NA1 | crown - crown |
| 35M82NS1 | crown - crown |
| 35M82N | crown |
| 0A2800N01 | case back gasket - case back gasket |
| 0A2800N | case back gasket |
| 86561700 | crystal gasket - plastic gasket for crystal |
| YL16A | band - band |
| YL15A | band - band |
| 11T10ASM | others - minute hand |
| 0354641 | others - winding stem |
| 6431510061 | others - case |
| 82703020 | others - case ring |
| 6431510075 | others - case |
| 64315180XB14 | others - dial |
| 64315180XG18 | others - dial |
| 64315180XS17 | others - dial |
| A180BS | others - push pin |
| 11T08AGH | others - hour hand |
| 11T08NGH | others - hour hand |
| 13SC04A2 | others - second hand |
| 13SC04ES | others - second hand |
| 11T10AGM | others - minute hand |
| 0Z0060B01 | others - crown and stem gasket |
| 11T10NGM | others - minute hand |
| 11T08ASH | others - hour hand |
Caliber 6431
