The Seiko 7771-5031 is a watch model based on the 7771 movement.
Parts List
| ET4N19SV01 | crystal |
| 25N01SN5 | crown |
| 25N01NS5C | crown |
| 0H2820N01 | case back gasket |
| AK03P | band - leather band |
| 09SC21VG | others - second hand |
| 09S53JGH | others - hour hand |
| A180AS | others - push pin |
| DZ0040B01 | others - crown and stem gasket |
| 09S53JGM | others - minute hand |